2026 Rutherford Cabernet Sauvignon ENT-685: Small Berries, Dark Earth, Serious Structure
Rutherford
Cabernet Sauvignon.
Small berries. Earth & structure.
Deeply ripe, dimpled Rutherford Cabernet with the smallest berries of our three Napa Cabernet lots and the most prominent earthy, savory impression at crush. Here is how we would balance the chemistry and then lean into that structure.
Alsace Vineyard · Block 04A · Rutherford AVA · Napa Valley
Original ETS-derived values · October 8, 2026 · View the analysis. Worked recipe: 27.9° → 26° Brix.
Your first ENT-685 Cabernet.
For a powerful dry Cabernet with more earthy, savory depth and confident structure, start here. This is a one-pail example at 26° Brix, not a substitute for measuring your own must. Water adjustment, pH correction and nutrition are three separate decisions.
From frozen must to wine
Thaw, then mix from the bottom up
Sanitize your equipment and thaw the pail under clean, controlled conditions. Before taking a Brix, pH or TA reading—and before making any additions—mix the thawed must thoroughly from the bottom upward. Get your paddle or spoon all the way to the bottom and keep mixing until the pail is uniform.
During freezing, sugar and acids can become concentrated in the remaining liquid and collect toward the bottom of the pail, sometimes as a clearer, heavier layer. If you sample before remixing, the reading may not represent the entire pail. Once homogeneous, transfer to a primary vessel with at least 25% headspace for the cap and foam.
Prepare the water and the two acid portions
Use low-mineral water that is chlorine- and chloramine-free. Plain distilled water with no minerals added is the easiest option. Unsure what kind of water to use? See the water guide →
For one pail with an estimated 3.5 gallons of liquid, our main working target is 26° Brix—about 16.0% potential alcohol from the measured glucose + fructose. Measure 0.26 gal (0.97 L) of suitable water. Weigh about 6 g tartaric for that water, plus our recommended 19 g for the must's pH correction: approximately 25 g total.
Add the combined treatment to the full pail. Both portions may be dissolved together in the measured water and blended thoroughly into the must. The 19 g is part of the 25 g total, not another addition afterward.
Mix, give it time, then recheck Brix and pH
Mix the entire pail thoroughly. After about 1 hour, take a representative sample and recheck Brix, pH and TA. Treat that as an early reading: acid response can continue to settle as the must equilibrates. When practical, check again later or the next day before making a fine correction. Our working pH target is 3.60. The 19 g recommendation is the WGD calculator's balanced one-shot for the original pH 3.80 reference sample; it does not guarantee an exact endpoint.
If the pH is still clearly high after remeasurement, enter the new measured pH and actual liquid volume in the full calculator and make a smaller follow-up addition to the whole pail if needed. Do not blindly repeat the original 19 g dose. Advanced winemakers who prefer a staged program can use smaller full-pail additions, but the beginner route is the one-shot above.
Rehydrate and inoculate BDX
Our first pick is 5 g BDX. If you have Go-Ferm Sterol Flash, follow that specific label. Use a separate portion of clean, chlorine- and chloramine-free water for rehydration and never put DAP in that water. Do not use the tartaric-acid water-back solution for yeast rehydration.
Add early nutrition and optional structure support
Opti-Red: 5 g near inoculation. FT Rouge: optional, up to 7 g. For the BDX working nutrient example, split 5 g Fermaid O and 8 g DAP into two early feeds: 2.5 g + 4 g after a 2–3° Brix fall, then again near one-third sugar depletion. Add separately in suspension; avoid late DAP catch-up additions.
Ferment for earth, depth and structure
Compared with Clone 169, I would be more willing to pursue extraction here. Work within the yeast's temperature range, keep the cap healthy, and consider three punchdowns a day during the active middle of fermentation if the tannins stay rich rather than bitter. Taste every day. The goal is to reinforce the lot's earthy, savory Cabernet character—not to extract simply because you can.
Press when the tannin says so
At dryness, decide by taste rather than calendar. If the skins and seeds still taste ripe and the tannin is broad rather than drying, a short post-fermentation maceration can be worth exploring. If bitterness or hard dryness appears, press. Complete and verify MLF if that is your plan, then reassess pH/TA and establish measured SO2 management before aging.
The smallest berries of our three Cabernets.
All three Rutherford Cabernets came in deeply ripe and just beginning to dimple. ENT-685 stood out physically: these were the smallest berries of the three Cabernet lots.
At crush, this was also the Cabernet where I noticed the earthy and savory side most clearly. Clone 169 pulled me toward bright berries; ENT-685 makes me want to explore darker earth, cedar, cocoa, tobacco and structured Cabernet character as the wine develops.
Block 04A at Alsace Vineyard is planted to ENT-685 on 101-14 rootstock and was established in 2009. Mature vines, clone, rootstock, block position and the season can all contribute to what we taste; none of those factors should be treated as a single proven cause.
Harvest impressions from Wine Grapes Direct. Small berries can mean a greater proportion of skin relative to juice, but that does not automatically mean “extract as much as possible.” Taste still decides.
Three Cabernets. Three different levers.
Ferment them separately first. This vintage gives you a rare chance to compare three Rutherford Cabernet selections before deciding whether they belong together.
Clone 169 · planted 2019
Our brightest berry impression at crush. The guide for that lot emphasizes fruit preservation, polish and a powerful but less aggressive extraction plan.
Winemaking emphasis: let the fruit shine.
ENT-685 · planted 2009
Smallest berries and the earthiest impression of the three. This is the lot where I am most interested in confident extraction and savory complexity.
Winemaking emphasis: earth, depth and structure.
Clone 7 · planted 2010
Another mature Rutherford Cabernet block and an ideal third point of comparison at the blending bench.
Winemaking emphasis: taste it independently before deciding its role.
Keep the lots separate through fermentation and MLF if you can. Later, make bench trials: ENT-685 can provide a darker, more structural counterpoint to Clone 169's brighter fruit while Clone 7 gives you another Cabernet layer to work with—before another Bordeaux variety ever enters the blend.
Here, I would lean into extraction.
The fruit is already ripe and concentrated, but ENT-685 gives us a different stylistic opportunity from Clone 169. The smaller berries and stronger earthy impression make me more interested in building skin-derived structure, savory depth and cellar-worthy tannin—as long as the ferment keeps tasting good.
More confident cap work
BDX is our first pick for the classic structured direction. Keep the cap wet and healthy; during the active middle of fermentation, two to three punchdowns daily is a reasonable starting framework, and I would be comfortable moving toward the firmer end of that range here.
A somewhat warmer, controlled red-wine fermentation can support extraction, but never chase heat for its own sake. Stay inside the chosen strain's range and watch the wine, not just the thermometer.
Let taste decide the press date
If the wine reaches dryness and the skins and seeds still taste ripe, a short post-fermentation maceration may be worth trying. Taste daily. When tannin moves from broad and structured toward bitter, hard or drying, you have your answer: press.
This is permission to explore more extraction—not a requirement to extend maceration.
At 26° Brix, the 70%-liquid one-pail example needs about 0.26 gal water—roughly a 7% increase in the initial liquid volume. It also dilutes potassium from the original 1,500 mg/L to roughly 1,400 mg/L before other fermentation changes. That helps the chemistry somewhat, but pH response still has to be measured.
The numbers behind the plan.
These are the measured pre-adjustment numbers from the October 8, 2026 ETS analysis for Cabernet Sauvignon ENT-685. They describe the must before water-back, tartaric, fermentation or MLF. They are not projections of the finished wine.
| Analyte | Measured result |
|---|---|
| Brix | 27.9° |
| Glucose + fructose | 292 g/L |
| pH | 3.80 |
| Titratable acidity (TA) | 3.7 g/L |
| Potassium | 1,500 mg/L |
| Yeast-assimilable nitrogen (YAN) | 87 mg N/L |
| L-malic acid | 1.26 g/L |
| Tartaric acid | 4.3 g/L |
| Volatile acidity (acetic acid) | 0.25 g/L |
| Ammonia | 28 mg/L |
| Alpha-amino compounds (as N) | 64 mg/L |
Figures above are transcribed from the ETS-derived customer-facing summary. The image below is that transcription, not an unaltered ETS laboratory PDF.
View the ENT-685 laboratory-results image
27.9° Brix / 292 g/L G+F
Ripe enough that a deliberate water-back makes sense for a dry style. At 26° Brix, the simplified dilution model gives about 16.0% potential ABV; 25° is closer to 15.4%.
pH 3.80 / K 1,500
The pH correction is smaller than Clone 169's, and 1,500 mg/L potassium means somewhat less buffering than that lot. It is still enough that the actual response should be verified by remeasurement after the full-pail addition.
YAN 87 mg N/L
Still low for a high-sugar Cabernet fermentation. After the 26° water-back, the simplified dilution model is about 81 mg N/L before nutrients, so nutrition needs to be planned rather than assumed.
Everything in the table is a reported lab number. Predicted alcohol, water-addition volumes, projected YAN after dilution, yield and tartaric trial doses are planning estimates. The must you ferment is the must you need to measure.
Find your balance.
Our worked recipe aims at 26° Brix and about 16% potential alcohol. Compare the 26° reference with a 25° alternative, estimate the water, and keep water-preparation acid separate from the additional pH dose. Chemistry and yield outputs are estimates; the 19 g recommendation is tied to the reference recipe, not a live pH prediction.
Water note: use low-mineral, chlorine- and chloramine-free water. Unsure what kind to use? See the water guide →
Juice fraction & laboratory assumptions
Changing Brix does not invent a new glucose + fructose result. The sugar and YAN fields remain independent laboratory assumptions. Default liquid fraction: 70% of a 5-gallon must pail.
- Additional tartaric for must pH
- 19 g
- Combined tartaric, including water prep
- About 25 g
One reference pail: about 6 g for the water + 19 g for must pH = about 25 g total. The 19 g is included in that total, not added again.
Target pH 3.60; verify by measurement. For the reference beginner recipe, add the full combined water/acid treatment to the whole pail, dissolve and mix thoroughly, then recheck after about 1 hour for an early reading. A later or next-day reading is better for fine correction when practical because the pH can continue to settle. It is not a guaranteed endpoint. Do not repeat the original 19 g without new measurements and a newly calculated smaller follow-up.
Reference: 27.9 → 26° Brix; 70% projected liquid; original pH 3.80, potassium 1,500 mg/L. This panel scales the same-lot recipe by pail count only. Changed chemistry or dilution settings require a new pH assessment, so a combined acid total is not shown for them.
Yield & bottle estimates
Model: initial sugar 292 g/L; 17 g/L per 1% alcohol; 3.5 gal original juice; 75% water retention. These are estimates.
About the added bottles
The small increase at 26° is a bonus, not a guarantee. Real yield depends on press fraction, skins, lees and racking. Our goal is balance.
About acid, potassium and fruit
The water reduces potassium concentration a little; it does not settle the pH question. Our 19 g per-pail recommendation is a starting plan for this specific lot. The actual mixed-must pH and TA decide whether anything further is needed. Use the chemistry to support the earthy, structured style, but never chase a calculator number without tasting and measuring.
Choosing water for your adjustment.
For most people, the simple answer is easy: plain distilled water with no minerals added. If you are using tap, RO, spring, filtered or another source, the details below explain what to check.
Unsure what kind of water to use? Open the full water guide
For water-back, use water that is safe to drink, low in minerals, low in alkalinity, chlorine-free and chloramine-free. Do not assume that any bottled water, or anything that has passed through a filter, meets those requirements.
What to buy
The simplest choice: a sealed jug of plain distilled water sold for drinking or food use, with no minerals added. Examples of the exact product type:
- Great Value Distilled Water, 1 gallon — Walmart.
- Good & Gather Distilled Water, 1 gallon — Target.
Read the actual jug, not just the brand name. These are distilled-water examples, not endorsements of every water those brands sell. Check the label and supplier information if anything is unclear.
Reverse-osmosis (RO) water can also work when the finished water is suitable for drinking, low-mineral and chlorine-/chloramine-free, with no minerals added back. Check the supplier or the complete treatment system, not just the words “RO” or “purified.”
What not to grab by mistake
Skip mineral water, alkaline water, electrolyte water, and water labeled “minerals added for taste” for this recipe. Spring water is not our default; its mineral content and alkalinity need checking first.
“Purified” does not mean “no added minerals.” Check the ingredients for added mineral salts. Even “vapor distilled” is not enough: smartwater adds electrolytes after distillation. For this recipe, choose plain distilled water without that mineral addition.
Letting tap water sit overnight does not reliably remove chloramine. Do not rely on a quick boil or an unspecified pitcher/refrigerator filter, either. Use a verified treatment or buy suitable water.
This is about choosing water for winemaking, not a claim that properly treated municipal drinking water is unsafe.
Using city, well or filtered water? Check this first
Ask your local water utility: “Are you using chlorine or chloramine right now? Can you send the current water-quality report, plus hardness, total alkalinity and total dissolved solids (TDS)?” Ask for any values missing from the report; treatment can change seasonally. How to get your water report.
Check minerals and disinfectants separately. Alkalinity is the water's ability to neutralize acid; water pH alone does not tell you that capacity. A low TDS reading does not prove that chlorine or chloramine is absent. For treated tap water, verify the finished water with an appropriate total-chlorine test that includes combined chlorine, not a free-chlorine-only check. Free versus total chlorine explained.
Match the treatment to the source. A filter's chlorine-reduction claim is not automatically a chloramine-reduction claim. Check its rated performance, flow and replacement schedule. A standard water softener is not a substitute for demineralization, and carbon treatment does not by itself establish low mineral content. RO systems may also have a remineralizing stage; do not use that added-mineral output for this recipe.
Well water still needs checking. Confirm that it is safe to drink and check its minerals and alkalinity. No municipal disinfectant does not automatically make it suitable. When you cannot establish the water quality, use the plain food-use distilled-water option above.
For yeast rehydration, follow the exact yeast/Go-Ferm product protocol using a separate portion of clean, chlorine- and chloramine-free water. Never use the tartaric-acid water-back solution to rehydrate yeast.
Why these checks? Alkalinity can neutralize added acid, while chlorine/chloramine can create fermentation and taint risks. References: AWRI water-addition guidance; USGS alkalinity; CDC disinfectants; CDC treatment systems. All water references.
Earth first—or pull the fruit forward.
Both routes make a fully dry, powerful Rutherford Cabernet. Our first pick deliberately builds on what stood out at crush: earthy, savory character and small-berry structure. The second route uses gentler extraction and a more fruit-led yeast if you want to pull the wine toward cassis and berry instead.
Choose the character. Respect the limits.
ENT-685 showed the darkest earthy/savory impression of our three Cabernet lots. Start by comparing BDX and D254 for structure and depth, then use RP15 or D21 if you want to pull the wine toward fruit and freshness. The alcohol ratings are supplier guidelines, not guarantees at 16% ABV; match nutrients, temperature and a realistic target to your strain.
Uvaferm BDX
Jammy fruit, spice and classic Cabernet structure.
- Published alcohol tolerance
- 16%
- Fermentation temperature
- 64–86°F / 18–30°C
- Nitrogen demand
- Medium
- Fermentation pace
- Moderate
Why we’d consider it:
Upside
Watch-outs
Nutrient guidance & manufacturer notes
Alcohol tolerance and temperature are supplier specifications, not guaranteed results or an automatic fermentation stopping point. The fit, upside and watch-outs are our interpretation for this fruit. Selecting a strain here does not silently change the beginner recipe.
Read the manufacturer’s full specificationsThe advertised alcohol tolerance is a performance limit under suitable conditions, not a guarantee of fermenting this must dry. Yeast strain influences flavor and texture but does not replace fruit quality, fermentation temperature, oxygen management, and nutrient planning. Manufacturer specifications are linked on every card. We don't claim to have personally trialed every strain listed here.
Compare all 10 yeast strains
Yeasts shown: 10
Enoferm RP15
FRUIT-LED ALTERNATIVEripe fruit · spice · full mid-palate
- Alcohol tolerance
- 17%
- Temperature
- 68–86°F
- Nitrogen demand
- Medium
A strong fruit-led alternative when you want to pull ENT-685 away from its earthy side and toward ripe berry and spice.
Upside & watch-outs
Upside: More alcohol-tolerance margin than BDX at the 26° route, with ripe fruit, spice and substantial body.
Watch-outs: At 26 Brix, the margin over a 16% wine is small; its 17% rated tolerance still is not a fermentation guarantee. Feed this YAN-deficient must carefully.
Uvaferm BDX
OUR FIRST PICKjammy fruit · spice · classic structure
- Alcohol tolerance
- 16%
- Temperature
- 64–86°F
- Nitrogen demand
- Medium
Our first pick for ENT-685: classic Cabernet structure, cassis and spice that can sit naturally with this lot's earthy, savory impression.
Upside & watch-outs
Upside: A natural fit for the earth-and-structure direction, with enough ripe fruit to keep the wine balanced.
Watch-outs: The 16% supplier tolerance is close to the projected 16.0% potential alcohol at 26 Brix. Consider 25 to 25.5 Brix or a higher-tolerance strain if dryness is essential.
Lalvin ICV D21
aromatic freshness · berry · balanced palate
- Alcohol tolerance
- 16%
- Temperature
- 59–82°F
- Nitrogen demand
- Low
A very interesting way to emphasize lifted fruit and fresher red-berry impression from ripe Cabernet.
Upside & watch-outs
Upside: Potential freshness without sacrificing substantial Cabernet fruit.
Watch-outs: Watch nutrient and temperature stress; D21 has a supplier warning about VA under stress.
Lalvin ICV D254
ripe plum · roundness · weight
- Alcohol tolerance
- 16%
- Temperature
- 54–82°F
- Nitrogen demand
- Medium
Plush, rounded mouthfeel and generous dark-fruit character; a compelling alternative when you want ENT-685 broad and dark rather than especially firm.
Upside & watch-outs
Upside: Layered plum and dark berry flavor with fullness.
Watch-outs: Roundness can soften the structural edge; decide whether that serves the earthy Cabernet style you want.
Lalvin BM4x4
jam · cherry liqueur · warm spice
- Alcohol tolerance
- 16%
- Temperature
- 64–82°F
- Nitrogen demand
- High
A complex, oak-friendly structured red approach for an experienced winemaker with a tailored nutrition plan.
Upside & watch-outs
Upside: Complexity, color and generous mid-palate.
Watch-outs: High nitrogen demand is a major consideration in this 87 mg/L YAN must. Do not copy the RP15/BDX recipe.
Lalvin CLOS
berry · mid-palate · ageable tannin
- Alcohol tolerance
- 17%
- Temperature
- 55–90°F
- Nitrogen demand
- Medium
A structured, berry-focused red-wine option that can express plenty of fruit without losing tannin strength.
Upside & watch-outs
Upside: Berry character, tannin and a full mid-palate.
Watch-outs: Temperature shifts can change fermentation pace; follow the cap closely.
Lalvin T73
ripe berries · plums · fruit-forward
- Alcohol tolerance
- 16%
- Temperature
- 65–90°F
- Nitrogen demand
- Low
A low-demand fruit-led yeast worth considering for ripened Cabernet, still with a complete nutrient plan.
Upside & watch-outs
Upside: Ripe berries and plum with a medium-to-full palate.
Watch-outs: Supplier tolerance is 16%; the 26 Brix modeled potential is close to this, so leaving residual sugar is possible without a plan.
Uvaferm 43
red berries · color · fructose fermentation
- Alcohol tolerance
- 18%
- Temperature
- 55–95°F
- Nitrogen demand
- Low
A more resilient high-sugar or fructose-focused fermentation option, not necessarily my top berry-expression pick.
Upside & watch-outs
Upside: Useful fructose use when working close to a strain tolerance limit.
Watch-outs: Fast fermentation and high alcohol tolerance do not replace temperature control, nutrition and verification of a dry finish.
Lalvin EC-1118
neutral profile · fast · reliable
- Alcohol tolerance
- 18%
- Temperature
- 50–86°F
- Nitrogen demand
- Low
A reliability-focused, fairly neutral fermentation option if getting dry and through a difficult fermentation comes before varietal expression.
Upside & watch-outs
Upside: Neutral character leaves the grapes themselves in focus.
Watch-outs: May make unwanted SO2 under low-YAN stress and complicate MLF; manage nutrition carefully.
Enoferm Syrah
plum · violet · peppery spice
- Alcohol tolerance
- 16%
- Temperature
- 59–90°F
- Nitrogen demand
- Medium
A savory, peppery, floral alternative for somebody who wants to explore beyond a classic Cabernet fermentation.
Upside & watch-outs
Upside: Can contribute lifted floral notes and attractive spice.
Watch-outs: A spice-led experiment that may complement the savory side of ENT-685; it will not change Cabernet into Syrah.
What to add, how much, and when.
For the 26° Brix earth-and-structure route, think in separate jobs: acid to bring chemistry into range, rehydration nutrient for a strong yeast start, nitrogen during fermentation, and optional tannin/color support. Our usual 5 g Fermaid O and Opti-Red portions can be used, but the 87 mg/L starting YAN means the nutrient plan needs extra attention.
Reference batch: one 5-gal must pail, 3.5 gal juice assumption, plus about 0.26 gal prepared water = 3.76 gal (14.2 L) of liquid. Actual pail yield and additions change the dose calculations.
Yeast: BDX first
- One-pail example
- 5 g
- When
- At inoculation
BDX is our first choice for the structured, savory direction. D254 is the broad, dark-fruited alternative; RP15 is the fruit-led choice with more published alcohol-tolerance margin.
Go-Ferm Sterol Flash
- Standard kit portion
- 5 g
- When
- Yeast rehydration
Use the specific Sterol Flash instructions, not older hot-water Go-Ferm directions. Use separate chlorine-/chloramine-free water—not the acidified dilution water.
Fermaid O
- Working portion
- 5 g total
- When
- 2.5 g + 2.5 g early
One portion after a 2–3° Brix fall; a second at approximately one-third sugar depletion. Suspend before addition. In this low-YAN must, 5 g Fermaid O alone should not be assumed sufficient.
DAP / inorganic nitrogen
- Working BDX example
- ~8 g total
- When
- 4 g + 4 g early
An illustrative companion to 5 g Fermaid O for this ~14.2-L, 26° Brix batch, not an all-strain prescription. DAP is not automatically in the kit. Respect product limits, adjust to yeast demand and actual YAN, and avoid late catch-up additions.
Opti-Red
- Standard kit portion
- 5 g
- When
- At inoculation
Supports color and mouthfeel. ENT-685 already gives us strong raw material; use it as support for extraction choices, not as a substitute for tasting the cap.
FT Rouge
- Typical available portion
- Up to 7 g
- When
- Early fermentation
Optional early color/tannin support. Because this is the lot where we are already leaning into extraction, taste before automatically using the maximum.
Tartaric acid & water prep
- For 0.26 gal added water
- About 6 g
- Recommended additional pH dose
- 19 g per pail
About 25 g total for this reference recipe. Both portions may be dissolved in the measured 0.97 L of water; do not add the 19 g a second time.
For the original pH 3.80 lot, our working target is 3.60. For the reference beginner route, add the full combined treatment to the whole pail, mix thoroughly, and remeasure after about 1 hour; use a later or next-day reading for fine correction when practical.
Optional: Stimula Cabernet
- Supplier reference dose
- 40 g/hL
- 14.2 L equivalent
- ~5.7 g
A targeted fruit-ester nutrient from Scott Laboratories. Use as part of a redesigned nutrition plan, not casually on top of every other nutrient. Supplier details.
SO2 & MLF culture
- When
- Stage-dependent
- Dose
- Use analysis
The starting pH is lower than Clone 169 but still high enough that microbial management matters. Verify malolactic status, monitor free SO2 and pH, and do not bottle based on a calendar date.
The Scott Labs nutrition planner accounts for Brix, strain nitrogen demand, temperature and fermentation goals. Recalculate if you choose high-demand BM4x4, change your water-back, or obtain a new YAN reading. Organic nutrition and DAP are not gram-for-gram interchangeable.
Finish the wine, not just the fermentation.
The wine after fermentation is not the must in the ETS report. The pH, TA, alcohol and free SO2 that matter for bottling need to be measured in the finished wine.
Dry Cabernet & MLF
We would normally plan on malolactic fermentation for a classic dry Cabernet. The original 1.26 g/L malic acid means there is still chemistry to change through MLF, and pH can rise. Verify MLF completion analytically, then fine-tune acid and SO2 based on the wine you actually made.
Watch the structured style
More extraction makes finishing discipline even more important. Give tannin time to polymerize and settle before deciding the wine is “too hard.” Rack cleanly, protect it from oxygen, and make oak decisions from repeated tastings rather than from a preset calendar.
Measure the wine you actually made: pH, TA, alcohol, residual sugar, free and total SO2 as appropriate, and confirmed MLF status. Good grapes deserve a properly finished wine.
Add aging oak after MLF—then use cocoa, roast and earth on purpose.
Our standard red-grape program uses FT Rouge during fermentation for early tannin/color support. When you follow that program, our normal plan is to save the flavor oak for the cleaner wine: finish and verify MLF, rack off the heavy lees and particulate, then add oak to the wine you actually intend to age. That keeps more of the oak contribution in the finished wine instead of sending it out with a heavy post-MLF rack.
One important exception: if you intentionally skip FT Rouge or another fermentation tannin, fermentation oak becomes a separate tool. OSG’s Cabernet guide, for example, includes heavy-toast French or American small chips at 2 g/L during fermentation. Do not automatically stack a fermentation-oak program on top of the full FT Rouge plan.
A practical French-oak starting point: based on our experience, about 20 g of medium-to-heavy-toast French oak cubes per roughly 4 gallons of finished wine is a dependable place to start for the aging period. Taste the wine at about three months even at this dose: it may be right where you want it, it may benefit from more contact time, or you may decide to add another measured amount of oak. If you start above 20 g, taste earlier and more often so the oak does not run past the wine.
ENT-685 is where we are most comfortable leaning into darker oak. The general 20 g French-cube reference is still a good baseline, but the OSG High Mocha + XT4 finishing blend is especially attractive here for cocoa/toast, and High Mocha or Precision Fire Toast Savory staves can push farther into roast and savory depth. Even here, monitor the wine rather than assuming more oak is always better.
Think dose + format + time. Chips extract fastest, cubes build more gradually, and a large stave can seem quiet early while still carrying a lot of wood that keeps extracting. A slow start does not mean a stave has a low final ceiling.
French oak
For medium through heavy toast, our practical cube starting point is 20 g per ~4 gallons. For chips, start around 15 g per ~4 gallons and taste sooner. French oak is the classic lane for structure, toast and spice without forcing the oak to the front.
Hungarian oak
We treat Hungarian oak similarly to French for starting dose: about 20 g cubes or 15 g chips per ~4 gallons. It often lands near French oak stylistically but can show more vanilla, spice and caramel-like character. Toast and supplier still matter.
American oak
American oak commonly shows more obvious vanilla, coconut and sweet/spicy oak character, so we start lower: about 15 g cubes or 12 g chips per ~4 gallons, then taste before adding more. These are practical starting points, not manufacturer specifications.
Pick the oak you can actually get, scale it to your finished wine, and know when to taste.
Enter the finished wine volume after MLF and the post-MLF rack. The general French/Hungarian/American choices are practical starting points for home winemakers. The OSG choices marked as Cabernet references use the published rates from Oak Solutions Group’s Cabernet guide.
OSG Cabernet finishing reference: split the calculated total equally between High Mocha and XT4 chips. This is the darker cocoa/toast option we like for ENT-685; start tasting around 4–6 weeks.
For staves: the calculator shows the OSG material-rate equivalent in grams. A physical stave is normally sold by piece/configuration, so use OSG’s official calculator or product instructions to convert that program into the actual stave system you are buying. Taste on schedule and pull the stave when the oak is right.
Browse the wider Oak Solutions Group ēvOAK catalog
French, American & dark roast
ēvOAK Classic French Oak and Classic American Oak are the straightforward oak-family options. OSG lists French Oak and American Oak in chips, while its Classic tank-stave products are also available in cube, CUBEtube, infusion-stave, fan-system and Oak Flavoring Stix configurations. Premium Dark Roasted is listed in chips.
Five precision-toasted chip programs
NG.567F, NG.466F, NG.263F, NG.455A and NG.354A. OSG positions this series around combinations of intensity, mouthfeel and structure using French and American oak.
Flavor-forward finishing tools
High Spice, High Toast, High Mocha, High Vanilla, PURE2 Vanilla and High Caramel. OSG lists High Extract products in chips and stave-based formats; many stave products are also available as cubes and other configurations.
Longer-term aging profiles
33° Mendoza, 42° Rioja, 44° Bordeaux, 45° Rhône and 46° Burgundy. OSG describes Latitude as a long-term-aging series with gradual evolution; its published material notes a typical minimum maturation window of about 4–6 months.
Cuvée Nº 1 through Nº 5
Cuvée Nº 1, Nº 2, Nº 3, Nº 4 and Nº 5. The full Cuvée family is listed in stave/cube-style configurations; Nº 1 and Nº 2 are also listed in OSG's chip catalog.
Savory, Intense, Fruit, Balanced & XT4
Precision Fire Toast Savory, Intense, Fruit and Balanced are offered in stave/cube-style configurations. XT4 is listed as a chip product and appears in OSG's Cabernet finishing blend with High Mocha.
Also in OSG's broader catalog: the High Proof line (Charred Barrel, Sweet Shoppe, Rickhouse and Spice Rack) is aimed at high-proof/spirits applications, so we list it for completeness but do not build it into this wine-aging calculator. OSG also sells oak powder and trū/tan tannins; those are different tools from the post-MLF aging program here.
Catalog availability and configuration can change. See OSG's current configuration catalog ↗
French oak is usually the most classic/subtle lane, Hungarian often lands close to French with plenty of vanilla/spice character, and American oak is often more overtly vanilla/coconut/sweet-spice driven. Toast can move any of them toward caramel, coffee, smoke or dark chocolate. That is why the calculator gives you a starting dose and a tasting checkpoint, not a promise of a fixed flavor result.
Your cellar. Your notes.
What did you think of the juice? How are you making your wine? Whether this is your first batch or your fiftieth, we'd love to see what you do with our 2026 Rutherford Cabernet ENT-685. Tell us what you know, skip what you don't, and come back with updates.
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Make your own Rutherford ENT-685 Cabernet.
Alsace Vineyard · Block 04A · Rutherford AVA · five-gallon crushed grape must. The product listing includes both Alsace Cabernet selections; choose ENT-685 when ordering.
Sources & calculation assumptions
Grape chemistry: ETS Laboratories, analysis dated October 8, 2026, transcribed in the customer-facing ENT-685 lab summary above. All laboratory measurements are from the original pre-adjustment sample.
Vineyard facts: Alsace Vineyard Block 04A, Cabernet Sauvignon ENT-685 on 101-14 rootstock, planted 2009. The vineyard/block facts match the Wine Grapes Direct 2026 product listing.
Our winemaking estimates: the worked example uses 27.9° → 26° Brix, one 5-gallon must pail and 3.5 gallons projected liquid. The WGD dilution model gives water = 3.5 × (27.9 / 26 − 1) = 0.2558 gal (0.968 L), rounded to 0.26 gal / 0.97 L. At 6 g/L of added water, the water-preparation portion is 5.81 g tartaric, rounded to about 6 g. With the separate recommended 19 g pH portion, the combined amount is 24.81 g, rounded to about 25 g. Using 292 g/L starting glucose + fructose gives about 272.1 g/L after dilution and about 16.0% potential ABV with the approximate 17 g/L-per-1%-ABV planning factor. The 25° alternative models about 15.4%. One-pail liquid fraction is assumed 70%, and 75% of added water is assumed retained at bottling. This simplified model ignores density differences. Brix, alcohol and pH must still be measured.
Acid recommendation: using the same WGD calculator logic used across these harvest guides, the big-red style uses a 3.50 floor and a High Response worst-case sensitivity of 0.20 pH per 1 g/L TA increase. At pH 3.80 with 3.5 gal projected liquid, 19 g is the largest whole-gram balanced one-shot that stays above the 3.50 style floor in that illustrative worst case; the conservative target-safe start is 13 g. We use 19 g as the reference recipe because it matches the guide's balanced one-shot approach. Neither value predicts the actual response. For the beginner reference recipe, use the full-pail one-shot, mix thoroughly, remeasure after about 1 hour for an early reading, and use a later or next-day reading before fine correction when practical.
Acid response and verification: Wine Grapes Direct's main Brix & pH calculator explains the illustrative response bands, potassium heuristic and recommendation rules. Scott Laboratories' hot-fruit guidance discusses high potassium/pH and the importance of verifying the actual acid response.
Yeast & nutrients: individual yeast supplier profiles (links in the selector), Scott Labs Fermentation Nutrition Planner, Yeast Nutrition 101 and Stimula Cabernet. Suggested nutrients need adjusting for measured must volume, Brix and yeast strain.
Water-quality guidance: Australian Wine Research Institute: water addition recommends removing chlorine/chloramines from must-addition water. USGS: alkalinity and water explains acid-neutralizing capacity. CDC: chlorine and chloramine covers utility treatment and why standing does not remove chloramine. EPA: Consumer Confidence Reports explains how to obtain your utility's water report.
Buying examples: Great Value Distilled Water, 1 gallon and Good & Gather Distilled Water, 1 gallon. Check the current jug label and choose plain distilled water suitable for food/drinking use with no added minerals.
Oak program: Oak Solutions Group's ēvOAK Usage Calculator scales oak products by wine volume and product format. Their Cabernet Sauvignon recommendations list High Mocha and Precision Fire Toast Savory tank staves at 3.5 g/L for aging, a 50/50 High Mocha + XT4 chip blend at 1 g/L total for finishing, and heavy-toast French or American small chips at 2 g/L during fermentation. High Mocha is described with mocha, vanilla and toast; the tank-stave version emphasizes cocoa, coffee and vanilla. Precision Fire Toast Savory is described as intensely fire-toasted/roasted with dark-fruit emphasis and a long finish. Our home-batch oak scaler simply multiplies the published g/L reference by finished wine volume and the user-selected WGD trial percentage; it does not reproduce OSG's proprietary Percentage of Flavor model or convert between physical formats.
Field observations: the descriptions of dimpled fruit, the smallest berries of the three Cabernet lots, and ENT-685's more prominent earthy/savory impression are Wine Grapes Direct's direct 2026 harvest impressions. The suggested extraction direction is our stylistic recommendation, not a guaranteed outcome.