White Grape Pét-Nat (Méthode Ancestrale)
Pétillant naturel — pet-nat — is the simplest sparkling method and the riskiest. You bottle live wine before primary fermentation completes, so trapped CO₂ from the residual sugar carbonates in bottle. Bottle at the wrong SG and you either get bottle bombs (too high) or flat wine (too low). Use only heavy beer or Champagne bottles with crown caps. Open chilled and carefully — pet-nat tends to gush.
Ingredients
| 5 gal | Fresh white grape juice (Chardonnay or similar) |
| 5 g | Wine yeast (low-attenuation, e.g., D47) |
| 1 tsp | Yeast nutrient |
Equipment
- 5-gallon primary
- Hydrometer
- Heavy beer/champagne bottles
- Crown caps + capper
Steps
- Day 0
Test must
Brix should be 19-22 for a balanced pet-nat (lower than typical wine).
- Day 0
Pitch yeast
Add nutrient sparingly; pitch yeast.
- Day 0-7
Primary
Ferment at 60-65°F. Track SG closely.
- Day 7
Bottle at right SG
Bottle when SG hits 1.010-1.015. Crown-cap heavy bottles. This is the critical step.
- Day 7-49
Bottle ferment
Store cool. Pressure builds as remaining sugar ferments. 4-6 weeks to dryness.
- Day 90
Rest
Age in bottle 1-2 months. Some makers disgorge (open, lose lees, recap); many leave cloudy.