2026 Rutherford Cabernet Sauvignon Clone 7: Balanced Fruit, Earth & Winemaker Freedom
Rutherford
Cabernet Sauvignon.
Fruit and earth in balance.
Of our three 2026 Rutherford Cabernets, Clone 7 felt like the middle path: good ripe fruit, a clear earthy layer, and less brute force than either Clone 169 or ENT-685. It was the most naturally balanced of the three. At 25.8° Brix, it is already in a strong dry-Cabernet fermentation zone, so our beginner route is simple: make the balanced wine first, then use extraction and oak to nudge it toward fruit or earth if you want.
Alsace Vineyard · Block 08B · Rutherford AVA · Napa Valley
Original ETS values · October 8, 2026 · View the analysis. Reference route: no routine water-back; estimated potential alcohol about 15.6%.
Your first Clone 7 Cabernet.
This is the easiest of our three 2026 Rutherford Cabernets to approach without a major sugar adjustment. At 25.8° Brix and 265 g/L glucose + fructose, the reference must already models about 15.6% potential alcohol. Our beginner route is intentionally complete and simple: leave the Brix alone, make the 21 g acid adjustment, use BDX with the full one-pail addition plan below, and make the most balanced expression of the fruit first.
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, sometimes as a clearer, heavier layer. Sampling before remixing can give you a misleading number. Once homogeneous, transfer to a primary vessel with at least 25% headspace.
Leave the Brix alone unless you want a lighter style
The lab sample is already 25.8° Brix with 265 g/L glucose + fructose, which models about 15.6% potential alcohol using our 17 g/L-per-1%-ABV planning factor. Our beginner route uses no routine water-back.
If you intentionally want to move to 25° Brix, the same 3.5-gal-liquid model estimates about 0.11 gal / 0.42 L water and about 2.5 g tartaric in that water at 6 g/L. That changes the pH plan, so recalculate rather than adding the reference 21 g automatically.
Make the 21 g pH adjustment
For the unchanged 25.8° reference lot, add 21 g tartaric acid directly to the full pail. Target pH is about 3.60. The easiest way to distribute it is to pull a cup or two of must, dissolve the full 21 g in that liquid, pour it all back into the pail, then mix the entire must aggressively from the bottom up.
If you can measure pH, wait about 1 hour after thorough mixing for a practical check. Do not chase a small difference immediately; a must with skins and solids can continue to equilibrate, so the next-day reading is better for fine correction. If a meaningful second adjustment is needed, use the new measured pH in the WGD calculator. For experienced winemakers who prefer a staged approach, the conservative alternative is 14 g first, mixed into the whole pail, followed by remeasurement before calculating the final addition.
Add Opti-Red and FT Rouge
For our balanced one-pail route, add 5 g Opti-Red at or just before inoculation and 7 g FT Rouge during the early fermentation window. Mix each addition thoroughly. These are structure/color tools, not yeast nutrients, so they do not replace the nutrition program below.
Rehydrate and inoculate BDX
Use 5 g BDX. Rehydrate with 5 g Go-Ferm Sterol Flash according to the exact product instructions using a separate portion of clean chlorine-/chloramine-free water. Never use acidified adjustment water to rehydrate yeast, and never put DAP in the rehydration water. Inoculate in the 60s–70s °F and keep the active fermentation within BDX's published temperature range.
Feed BDX twice, early
Using BDX's medium nitrogen demand, 25.8° Brix, the measured 123 mg/L YAN, and the guide's 3.5-gallon liquid assumption, our reference program is 5 g Fermaid O + about 3 g DAP total.
Feed 1: after the must falls about 2–3° Brix (roughly 23–24°), add 2.5 g Fermaid O + 1.5 g DAP. Feed 2: near one-third sugar depletion (roughly 17° Brix), add the other 2.5 g Fermaid O + 1.5 g DAP. Suspend nutrients before adding and mix carefully because active must can foam. Do not save DAP for a late rescue addition.
Choose your extraction level
This is the Cabernet that gives you the most stylistic freedom. For balance, use two punchdowns per day during active fermentation as a starting point and taste daily. Want more fruit? Stay gentler and press earlier. Want more earth and structure? Move toward the firmer ENT-685-style extraction program while the tannins remain ripe.
Press, finish MLF, rack, then add aging oak
Press when the fruit and tannin feel integrated. Complete and verify malolactic fermentation, then rack off the heavy lees and particulate before adding your aging oak. The early FT Rouge addition already handled fermentation-stage tannin/color support, so there is little reason to bury expensive aging oak in material you expect to rack away. After the post-MLF rack, establish the wine's SO2 plan and add the oak to the cleaner wine you actually intend to age.
Where the valley floor begins to rise.
Block 08B sits where the land begins a gentle rise toward the eastern mountains. It is not a dramatic elevation gain, but the change in slope is noticeable when you are standing in the vineyard.
All three Rutherford Cabernets were beautifully ripe and just beginning to dimple. To my palate, Clone 7 landed between the other two in flavor: less overtly fruit-driven than Heritage Clone 169, but not as earthy and forceful as ENT-685.
That middle position is what makes this lot interesting. It had good fruit, a real earthy layer, and enough structure to go in more than one direction. It may ultimately be the most approachable of the three—and the easiest one for a winemaker to shape around personal preference.
Block 08B was planted in 2010. The slope, clone, vine age, block position and season may all contribute to what we tasted, but we should not assign the flavor to any single factor.
Harvest impressions from Wine Grapes Direct. The description of the gentle rise is a direct field observation, not a claim of a high-elevation vineyard.
Three Cabernets. Clone 7 is the middle path.
Ferment them separately first. The three lots gave us genuinely different impressions at crush, and Clone 7 sits neatly between the other two.
Clone 169 · planted 2019
Brightest fruit expression. Ripe cassis, blackberry and black cherry; the guide emphasizes preserving that fruit while still making a powerful Cabernet.
Winemaking emphasis: fruit and polish.
ENT-685 · planted 2009
Smallest berries and the earthiest impression. The guide leans harder into extraction, cocoa, roast and savory structure.
Winemaking emphasis: earth, depth and structure.
Clone 7 · planted 2010
Fruit and earth in the most even balance. Less forceful than either extreme, but versatile and potentially the most immediately approachable.
Winemaking emphasis: choose your direction.
Keep the lots separate through fermentation and MLF if you can. Later, bench trials could use Clone 7 as the bridge between Clone 169's brighter fruit and ENT-685's darker structure—or you may decide Clone 7 is most interesting on its own.
You can push it—or leave it alone.
Clone 7 does not demand one extraction philosophy. It showed enough fruit to reward restraint and enough earth and structure to reward a firmer hand. That makes daily tasting more important than a fixed punchdown count.
Our default
Start around two punchdowns per day through active fermentation, keep the cap healthy, and press when fruit and tannin feel integrated. This is the best place to start if you want the wine to show both sides of the lot.
Gentler and earlier
Use a fruit-led strain such as RP15, keep cap work moderate, and press a little earlier if the berry character is where you want it. Avoid extended maceration by habit.
More deliberate structure
Use BDX or D254, move toward two to three punchdowns during the active middle, and consider a short post-fermentation maceration only if the seeds and skins stay ripe and the tannin remains broad rather than bitter.
At 25.8° Brix and 265 g/L glucose + fructose, our reference route leaves the sugar concentration alone. That also means the original 1,500 mg/L potassium and 123 mg/L YAN are not diluted before fermentation. If you choose the optional 25° route, recalculate pH and nutrition after dilution.
The numbers behind the plan.
These are the measured pre-adjustment numbers from the October 8, 2026 ETS analysis for Cabernet Sauvignon Clone 7. They describe the must before tartaric, fermentation or MLF. They are not projections of the finished wine.
| Analyte | Measured result |
|---|---|
| Brix | 25.8° |
| Glucose + fructose | 265 g/L |
| pH | 3.82 |
| Titratable acidity (TA) | 3.7 g/L |
| Potassium | 1,500 mg/L |
| Yeast-assimilable nitrogen (YAN) | 123 mg N/L |
| L-malic acid | 1.58 g/L |
| Tartaric acid | 4.1 g/L |
| Volatile acidity (acetic acid) | 0.19 g/L |
| Ammonia | 51 mg/L |
| Alpha-amino compounds (as N) | 81 mg/L |
Figures above are transcribed from the ETS analysis. The image below is the Wine Grapes Direct customer-facing transcription, not an unaltered ETS laboratory PDF.
View the Clone 7 laboratory-results image
25.8° Brix / 265 g/L sugar
Using the measured glucose + fructose and our planning factor of 17 g/L per 1% alcohol gives about 15.6% potential ABV. That is why our default route does not water this lot back.
pH 3.82 / K 1,500
The pH still deserves attention. Potassium is lower than Clone 169's 1,850 mg/L, so we expect somewhat less buffering pressure, but the actual acid response still has to be measured.
YAN 123 mg N/L
This is substantially better than the other two Cabernet lots. It does not mean “no nutrients,” but it does mean we should use a lighter, strain-specific program rather than copying their DAP additions.
Everything in the table is a reported lab number. Potential alcohol, optional water volumes and tartaric trial doses are planning estimates. The must you ferment is the must you need to measure.
Start where the fruit already is.
Our reference route keeps Clone 7 at its measured 25.8° Brix, which models about 15.6% potential alcohol. Use the presets to compare that with a modest 25° dilution. The 21 g pH reference is shown only when the original no-water recipe is selected; changed dilution settings require a new pH assessment.
Water note: no routine water-back is recommended. If you choose a lower Brix target, 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.
- Balanced one-shot tartaric for must pH
- 21 g
- Combined tartaric, including water prep
- About 21 g
One reference pail: no Brix water-back + 21 g tartaric for must pH = about 21 g total. Our beginner route uses the full 21 g one-shot.
Target pH 3.60; verify by measurement. Add the acid to the full pail, dissolve and mix thoroughly from the bottom up, then allow about an hour before a practical recheck. The pH may continue to equilibrate afterward, so use the next-day reading for fine correction when possible. Do not repeat the original 21 g without a new measurement.
Reference: 25.8 → 25.8° Brix; 70% projected liquid; original pH 3.82, potassium 1,500 mg/L. Changed chemistry or dilution settings require a new pH assessment, so the reference acid dose is withheld when you alter the recipe.
Yield & bottle estimates
Model: initial sugar 265 g/L; 17 g/L per 1% alcohol; 3.5 gal original juice. No water-back in the reference route. These are estimates.
Why we leave 25.8° alone
The measured 265 g/L glucose + fructose models about 15.6% potential alcohol. That is already a serious Napa-style Cabernet, without the extra dilution step required by the other two lots.
About pH and potassium
Potassium is 1,500 mg/L, lower than Clone 169 but still in the WGD calculator's strong-buffering threshold. The 21 g balanced one-shot is a reference guardrail, not a promise of 3.60. Measure the actual response and let flavor decide where you stop.
Choosing water when you actually need it.
Clone 7 does not need routine water-back in our reference recipe. This section matters if you choose the optional 25° route, use water to dissolve an addition, or simply want to understand what water is appropriate for winemaking. The simplest choice is plain distilled water with no minerals added.
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.
One lot. Three legitimate directions.
Clone 7 is the most stylistically open of our three Rutherford Cabernets. The chemistry does not force a water-back, and the crush character gives you both fruit and earth to work with. Pick the route that sounds like the wine you want.
Choose the character. Respect the limits.
Clone 7 gives you the widest stylistic lane. BDX is our balanced starting point, RP15 pulls toward fruit and polish, and D254 pushes darker and rounder. At roughly 15.6% potential alcohol, published tolerance still matters, but this lot gives you more room than the 26° routes in the other Cabernet guides.
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 Clone 7 away from its earthy side and toward ripe berry and spice.
Upside & watch-outs
Upside: More alcohol-tolerance margin than BDX at the 25.8° route, with ripe fruit, spice and substantial body.
Watch-outs: At 25.8 Brix, the modeled 15.6% potential alcohol is below RP15’s 17% published tolerance, but that rating still is not a fermentation guarantee. Support the fermentation appropriately and verify dryness.
Uvaferm BDX
OUR FIRST PICKjammy fruit · spice · classic structure
- Alcohol tolerance
- 16%
- Temperature
- 64–86°F
- Nitrogen demand
- Medium
Our balanced first pick for Clone 7: classic Cabernet structure, cassis and spice while keeping both fruit and earth visible.
Upside & watch-outs
Upside: A natural fit for the balanced direction: classic Cabernet structure with enough fruit to preserve the lot’s middle-path character.
Watch-outs: The 16% supplier tolerance is close to the modeled 15.6% potential alcohol. Keep the fermentation healthy and verify dryness.
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 Clone 7 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 still matters at 123 mg/L YAN. Build a strain-specific nutrient plan rather than assuming the default is enough.
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%, close to the modeled 15.6% potential alcohol, so maintain a healthy fermentation and verify dryness.
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 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 Clone 7; it will not change Cabernet into Syrah.
What to add, how much, and when.
The big difference here is what you do not need: no routine Brix water-back and no heavy DAP program. For the balanced BDX route, however, we can still give beginners a complete one-pail schedule: 21 g tartaric, 5 g BDX, 5 g Go-Ferm Sterol Flash, 5 g Opti-Red, 7 g FT Rouge, 5 g Fermaid O and about 3 g DAP.
Reference batch: one 5-gal must pail with about 3.5 gal (13.25 L) projected liquid. Actual pail yield changes dose calculations.
Yeast: BDX balanced
- One-pail example
- 5 g
- When
- At inoculation
BDX is our balanced first choice. RP15 is the fruit-led alternative; D254 is the darker, rounder route.
Go-Ferm Sterol Flash
- Standard kit portion
- 5 g
- When
- Yeast rehydration
Use the specific Sterol Flash instructions. Use separate chlorine-/chloramine-free water.
Fermaid O
- BDX one-pail plan
- 5 g total
- When
- 2.5 g + 2.5 g early
For the balanced BDX route, add 2.5 g after a 2–3° Brix drop and the other 2.5 g near one-third sugar depletion. Suspend before addition. This organic-nitrogen portion is part of the complete nutrition calculation, not an optional extra piled on top.
DAP / inorganic nitrogen
- BDX one-pail plan
- ~3 g total
- When
- 1.5 g + 1.5 g early
Scott Labs classifies BDX as a medium-nitrogen strain. Their planning rule uses about 9 ppm YAN per °Brix, which puts a 25.8° must near 232 ppm required. Starting at 123 ppm leaves about 109 ppm to cover. With the guide's 3.5-gallon liquid assumption, 5 g Fermaid O supplies about 60 ppm of YAN-equivalent support, leaving roughly 49 ppm; about 3 g DAP supplies the remainder. This is a lot-specific BDX example, not an all-strain prescription.
Opti-Red
- Balanced one-pail plan
- 5 g
- When
- At inoculation
Our standard color/mouthfeel support for this beginner route. Add at or just before inoculation and mix thoroughly. It does not replace yeast nutrition.
FT Rouge
- Balanced one-pail plan
- 7 g
- When
- Early fermentation
Use the full 7 g one-pail portion for the balanced reference route. It adds early tannin/color support while the extraction program itself stays moderate.
Tartaric acid
- Recommended beginner one-shot
- 21 g per pail
- Advanced staged alternative
- 14 g first
Reference is the original pH 3.82, unchanged 25.8° Brix lot. Target pH is about 3.60. For beginners, add the full 21 g to the full pail, mix thoroughly and remeasure later. If you prefer the staged route, add 14 g first, mix the whole pail thoroughly, wait about an hour, remeasure, then calculate the second step. If you dilute to 25°, recalculate the pH plan.
Optional: Stimula Cabernet
- Supplier reference dose
- 40 g/hL
- 13.25 L equivalent
- ~5.3 g
A targeted fruit-ester nutrient from Scott Laboratories. Use it as part of a redesigned nutrition plan, not automatically on top of every other nutrient. Supplier details.
SO2 & MLF culture
- When
- Stage-dependent
- Dose
- Use analysis
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. Clone 7's higher YAN gives us permission to be more restrained—not permission to ignore nutrition.
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 1.58 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.
Protect the balance
Clone 7's advantage is that it does not need to be pushed to feel complete. Give the tannin time to settle, 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 choose the profile you want.
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.
Clone 7 is the middle path of the three Cabernets. French oak is our default balanced lane. Hungarian is an easy way to lean more vanilla/spice without leaving the classic family; American is useful when you deliberately want more obvious sweet spice and oak character, so we start it lower. The OSG finishing and stave options let you push darker or more specialized if the young wine asks for it.
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.
Based on our experience, 20 g of medium-to-heavy-toast French oak cubes per about 4 gallons is a dependable aging starting point. Taste around three months even at this dose. If the wine wants more oak, continue contact or add another measured amount; if you start above 20 g, taste earlier and more often.
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 Clone 7. Tell us what you know, skip what you don't, and come back with updates.
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Make your own Rutherford Clone 7 Cabernet.
Alsace Vineyard · Block 08B · Rutherford AVA · five-gallon crushed grape must. The product listing includes both Alsace Cabernet selections; choose Clone 7 when ordering.
Sources & calculation assumptions
Grape chemistry: ETS Laboratories, analysis dated October 8, 2026. Original Clone 7 sample: TA 3.7 g/L, pH 3.82, VA 0.19 g/L, L-malic acid 1.58 g/L, tartaric acid 4.1 g/L, Brix 25.8°, glucose + fructose 265 g/L, ammonia 51 mg/L, alpha-amino compounds 81 mg/L, YAN 123 mg/L, potassium 1,500 mg/L.
Vineyard facts & field observation: Alsace Vineyard Block 08B, Cabernet Sauvignon Clone 7, planted 2010, Rutherford AVA. Wine Grapes Direct observed the block at the beginning of a subtle rise toward the eastern mountains. That is a field description, not a claim of significant elevation.
Potential alcohol: the reference uses the measured 265 g/L glucose + fructose and the same approximate planning factor used in our other guides, 17 g/L fermented sugar per 1% ABV: 265 / 17 = 15.59%, rounded to 15.6% potential ABV. This is an estimate, not a measured finished alcohol.
Optional 25° route: for one 5-gallon must pail with 3.5 gallons projected liquid, water = 3.5 × (25.8 / 25 − 1) = 0.112 gal (0.424 L), rounded to 0.11 gal / 0.42 L. At 6 g/L, that water would contain about 2.5 g tartaric. Diluting the measured sugar proportionally gives about 256.8 g/L and roughly 15.1% potential ABV. Any dilution changes the pH plan and should be recalculated.
Acid recommendation: using the same WGD calculator logic used across these harvest guides, the big-red style uses a 3.50 floor and an illustrative High Response sensitivity of 0.20 pH per 1 g/L TA increase. At pH 3.82 with 3.5 gal projected liquid, 21 g is the largest whole-gram balanced one-shot that stays above the 3.50 style floor. That is why our beginner route uses the full 21 g addition. The more cautious staged alternative is 14 g into the full pail, followed by remeasurement before a second addition. Neither value predicts the exact final pH.
BDX nutrition reference: Scott Labs lists BDX as a medium-nitrogen strain and uses about 9 ppm YAN per °Brix as its medium-demand planning rule. At 25.8° Brix that is about 232 ppm. Subtracting the measured 123 ppm leaves about 109 ppm additional support. In the guide's 3.5-gal (13.25 L) liquid model, 5 g Fermaid O is about 37.7 g/hL; using Scott Labs' 64 ppm YAN-equivalent at 40 g/hL gives about 60 ppm equivalent. The remaining roughly 49 ppm corresponds to about 3 g DAP using the Scott comparison of 80 ppm YAN at 40 g/hL. This is a planning model, not an all-strain nutrient prescription.
Acid response and verification: Wine Grapes Direct's main Brix & pH calculator explains the response bands, potassium heuristic and recommendation rules. Potassium is context—not a guaranteed pH prediction.
Yeast & nutrients: individual yeast supplier profiles (links in the selector), Scott Labs Fermentation Nutrition Planner, Yeast Nutrition 101 and Stimula Cabernet. Starting YAN 123 mg/L supports a lighter nutrient approach than the lower-YAN Cabernet lots, but exact additions remain strain- and batch-specific.
Water-quality guidance: Australian Wine Research Institute: water addition, USGS: alkalinity and water, CDC: chlorine and chloramine, and EPA Consumer Confidence Reports.
Oak program: Oak Solutions Group's ēvOAK Usage Calculator scales oak 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 and a 50/50 High Mocha + XT4 chip finishing blend at 1 g/L total. We present those as optional darker directions for Clone 7, not as a required oak program.
Field impressions: the descriptions of Clone 7 as more balanced, less fruit-dominant than Clone 169 and less earthy/powerful than ENT-685 are Wine Grapes Direct's direct 2026 harvest impressions and stylistic interpretation, not laboratory conclusions.