Make a powerful Napa red with our 2026 Rutherford Cabernet Sauvignon Clone 169 winemaking guide, covering acid adjustments, yeast, fermentation, and aging.

Our 2026 Rutherford Napa Valley Tannat arrived at an extraordinary 33.6° Brix, with intense blackberry-preserve flavors, deep color, and remarkable structure. Inspired by Italian winemaking traditions like Amarone and Recioto, we're exploring everything this exceptional fruit can become—from powerful dry reds to naturally sweet and fortified wines.

Discover the complete ETS laboratory analysis, interactive water-back and winemaking calculators, yeast recommendations, and step-by-step instructions for beginners. We're also inviting customers to share their own winemaking experiences, photos, and videos.

Whether you're an experienced winemaker or making your first batch, explore what's possible with our premium frozen Tannat grape must from Napa Valley.

Looking for a reliable wine pH calculator or tartaric acid addition calculator that actually reflects real winemaking conditions?

This free winemaking adjustment calculator was built specifically for serious home winemakers working with fresh juice or frozen must. It helps you calculate:

• ✔️ Tartaric acid additions to reach your target pH

• ✔️ Water-back calculations for high Brix must

• ✔️ Chaptalization sugar additions

• ✔️ Style-aware pH guardrails for reds, whites, and rosé

• ✔️ Adaptive benching guidance to prevent overshooting

Unlike generic wine math tools, this calculator accounts for:

• Must vs juice volumes

• Projected liquid yield

• High-response vs buffered pH scenarios

• Stylistic safety floors

• Real-world bench workflow

Whether you’re adjusting Cabernet Sauvignon, Pinot Noir, Chardonnay, Syrah, or Rhône-style blends, this tool helps you make controlled, incremental acid adjustments with professional-level logic.

If you’ve ever wondered:

• “How much tartaric acid should I add per gallon?”

• “How do I lower wine pH without overshooting?”

• “How much sugar do I add to raise Brix?”

• “How do I acidulate water for dilution?”

This calculator walks you through it step-by-step.

Designed by winemakers for winemakers — and optimized for real cellar conditions, not textbook theory.

👉 Try the Wine Grapes Direct Winemaking Calculator and dial in your must with confidence.

Make premium Rutherford Petite Verdot at home. Learn how to work with frozen grape must, yeast choices, nutrients, oak, and more in this practical winemaker’s guide.

Make premium Napa Calistoga Cabernet Sauvignon at home. Learn how to work with frozen grape must, yeast choices, nutrients, oak, and more in this practical winemaker’s guide.

Make premium Rutherford Merlot at home. Learn how to work with frozen grape must, yeast choices, nutrients, oak, and more in this practical winemaker’s guide.

Join us on TikTok at Wine Grapes Direct where Michael brings the art of winemaking to life, set against a lively backdrop of mules and chickens.

Tastes Like Sunshine