Sourdough Bulk Fermentation Time at 74 Degrees (74°F / 23°C) with 5% Starter (+57.1% Rise)
LAB 4.9:1 organic acid balance and 13.7–17 hr bulk schedule for 74°F (23.3°C) doughs inoculated at 5%.
Under 74°F (23.3°C) thermal kinetics (Q10=0.93x) and 5% starter (25g/500g), bulk spans 13.7–17 hours with a 4.9:1 lactic-to-acetic profile. Terminate fermentation at +57.1% true volumetric expansion (+43.1% vertical height rise in a sloped bowl to 5.72 cm), preventing the +77.6% volume explosion of a 2x vertical climb.
- Estimated Bulk Time
- 13.7–17 hrsAt 74°F (23.3°C) with 5% starter (Q10=0.93x)
- Target Aliquot Volume Rise
- +57.1%Capped volumetric cutoff (<45°F dormancy)
- Sloped Bowl Height Target
- 5.72 cm+43.1% vertical climb from 4.0 cm
- 2x Height Trap Warning
- +77.6% VolCoil fold every 36m (LAB 4.9:1)
Arrhenius Kinetics & Coil-Fold Schedule Matrix Around 74°F (5% Inoculation)
5-point neighborhood comparison around 74°F (23.3°C) and 5% starter (25g/500g flour), showing window hours, conical height rise %, straight-wall volume rise %, and 36-min coil fold intervals.
| Temp & Levain Seed (Around 74°F / 5%) | Fermentation Window | 9" Conical Height Rise | Straight-Wall Volume Rise | Coil Fold Cadence |
|---|---|---|---|---|
| 72°F (22.2°C) @ 3% (15g) Cooler / Lower Seed | 22.9–29 hrs (1374–1740m) | +50.3% height (4.0 → 6.01 cm) | +67.4% vol (2x trap: +93.3%) | Every 39 min (Row 1) |
| 74°F (23.3°C) @ 3% (15g) Baseline Temp / Lower Seed | 20.1–24.9 hrs (1206–1494m) | +43.1% height (4.0 → 5.72 cm) | +57.1% vol (2x trap: +77.6%) | Every 37 min (Row 2) |
| 74°F (23.3°C) @ 5% (25g) [Current Target] | 13.7–17 hrs (822–1020m) | +43.1% height (4.0 → 5.72 cm) | +57.1% vol (2x trap: +77.6%) | Every 36 min (Row 3) |
| 74°F (23.3°C) @ 8% (40g) Baseline Temp / Higher Seed | 9.6–11.9 hrs (576–714m) | +42.9% height (4.0 → 5.72 cm) | +56.7% vol (2x trap: +77%) | Every 35 min (Row 4) |
| 76°F (24.4°C) @ 8% (40g) Warmer / Higher Seed | 8.3–10.3 hrs (498–618m) | +36.8% height (4.0 → 5.47 cm) | +48.1% vol (2x trap: +64.3%) | Every 33 min (Row 5) |
Custom Batch Recalculation Engine
Fine-tune starter hydration between 50% stiff and 125% liquid while keeping your bulk fermentation temp × inoculation ratios locked.
When to Stop Bulk Fermentation at 74 Degrees (74°F / 23°C): Target +57.1% Rise
Symbiotic lag-phase duration for 5% starter (25g/500g flour) at 74°F (23.3°C) is governed by a 0.93x thermal multiplier and a 4.9:1 lactic/acetic trajectory. Once the dough climbs +43.1% vertically to 5.72 cm (+57.1% aliquot volume) between 13.7 and 17 hours, yeast dormancy must be induced below 45°F.
Biot-number thermal gradients inside an 850g–950g batard mean the outer crust chills to 45°F long before the 74°F (23.3°C) center. For a 5% levain formula (Q10=0.93x, 36-min fold spacing), terminating bulk at 13.7–17 hrs and 5.72 cm (+43.1% height / +57.1% volume) prevents center-crumb blowout.
Precision Bulk Fermentation Workflow: 74°F (23.3°C) with 25g Levain
- Seed & Thermal Check (74°F / 23.3°C): Verify dough core reads 74°F after incorporating 25g active levain (5% baker's math) for a 4.9:1 LAB balance.
- Aliquot & Sloped Vessel Setup: Place 40g dough in a straight cylinder (mark +57.1%) and set a ruler at 5.72 cm (+43.1% climb) on your 24 cm sloped bowl.
- Gluten Alignment (36-Min Intervals): Perform gentle folds every 36 minutes without degassing; stop folding 90 minutes before hour 13.7.
- Bench Preshape & 38°F Retard: Dump onto the bench between 13.7 and 17 hours at +57.1% rise, tension-roll, and refrigerate immediately until core drops past 45°F.
Technical Q&A: Sourdough Bulk Fermentation Time at 74 Degrees (
At what internal temperature does a 74°F dough stop rising in the fridge?
When transferred from 74°F (23.3°C) to a 38°F refrigerator at +57.1% volume (5.72 cm bowl height), wild yeast budding tapers into dormancy once the core cools below 45°F.
What happens if my 74°F kitchen warms up by 2°F during a 5% starter bulk?
A +2°F rise to 76°F accelerates Q10 kinetics above 0.93x and shortens the 13.7–17 hr window, so monitor the 5.72 cm (+57.1% volume) mark closely.
When should I stop stretching and folding a 74°F dough with 5% starter?
Complete your 36-minute coil fold sets within the first 8.2 hours at 74°F (23.3°C), leaving the final stretch undisturbed until the dough reaches 5.72 cm (+57.1% volume).