Overnight 1:8:8 Sourdough Starter Feeding Ratio to Build 30g (12 - 16 hrs Peak Window)
High-dilution overnight levain math to build 30g of sweet, de-acidified starter (100% Liquid) with zero morning collapse.
Want 30g of active levain and zero waste? Mix 2g of your existing culture with 14g flour and 14g water — a 1:8:8 ratio at 100% Liquid. Fed at 75°F the starter peaks in 12 - 16 hrs and smells sweet rather than sour. Scale up to 50g (3g seed, 24g flour, 23g water) and the extra 20g stays in the jar as tomorrow's seed. Ideal for Extended 14-hour high-dilution de-acidifying refresh.
- Exact 30g Build
- 2g : 14g : 14gStarter : Flour : Water (1:8:8)
- 30g + 20g Jar Reserve
- 3g : 24g : 23gBuilds 50g total (0g discard waste)
- Estimated Peak Window
- 12 - 16 hrsAt 74°F–76°F (23.5°C–24.5°C)
- Levain Hydration
- 100%Extended 14-hour high-dilution de-acidifying feed
1:8:8 Sourdough Starter Feeding Chart Around a 30g Build
Zero-waste gram breakdown for 1:8:8 (100% Liquid) centred on the 30g target, with the 50g jar reserve alongside.
| Target Levain Yield | Seed Starter (1 Part) | Fresh Flour (8 Parts) | Water (8 Parts) | Peak Ripening Time @ 75°F |
|---|---|---|---|---|
| Levain build 20g ([Anchor]) | 1g cultured seed | 9g sifted flour + 10g liquid | zero-waste reserve 20g | 12 - 16 hrs dome window |
| Levain build 50g (Down 10g) | 3g cultured seed | 24g sifted flour + 23g liquid | zero-waste reserve 20g | 12 - 16 hrs dome window |
| Levain build 30g (Up 10g) | 2g cultured seed | 14g sifted flour + 14g liquid | zero-waste reserve 20g | 12 - 16 hrs dome window |
| Levain build 20g (Down 20g) | 1g cultured seed | 9g sifted flour + 10g liquid | zero-waste reserve 20g | 12 - 16 hrs dome window |
| Levain build 40g (Up 20g) | 2g cultured seed | 19g sifted flour + 19g liquid | zero-waste reserve 20g | 12 - 16 hrs dome window |
Real-Time Dough & Starter Scaling Sandbox
Scale this Overnight 1:8:8 (1 8 8) Sourdough St specification up or down on your digital scale with zero hydration drift.
De-Acidifying Your Culture: Why High-Ratio 1:8:8 Feeds Maximize Oven Spring (30g Build)
Temperature and ratio interact. The 1:8:8 figure of 1:8:8 does not mean the same thing in a 68°F kitchen as in an 82°F one: with the 12 - 16 hrs window quoted at 75°F, a cooler room stretches it by roughly 3.8% per degree, so 14g of flour in a 100% Liquid feed may need longer than the label implies.
Flour choice shifts the timeline more than most bakers expect. At 1:8:8 with 14g of flour, a malted bread flour peaks faster and sweeter than an unmalted one, because the added amylase liberates more maltose per minute and the culture simply runs out of substrate sooner.
Zero-Discard Scraping Method for 30g Levain (1:8:8)
- Zero the Scale and Pre-weigh (3g / 24g / 23g): Set out three vessels and weigh each ingredient before you open the starter jar.
- Bloom the Seed (3g): Add the 3g of ripe seed to 23g of water and stir until the mixture becomes a uniform cloudy suspension.
- Add Flour in Two Pours (24g): Incorporate half the flour, wait 20 minutes for hydration, then work in the remainder so no dry pockets survive.
- Ferment to a Dome (12 - 16 hrs): At 75°F the 1:8:8 culture should double and dome in 12 - 16 hrs; pull 30g at peak and return 20g to the fridge.
Diagnostic Answers: Overnight 1:8:8 (1 8 8) Sourdough Starter Ra
Is a 1:8:8 ratio too acidic for a 30 grams levain?
No. At 1:8:8 the acid from the previous batch is diluted across 8 parts of flour and 8 parts of water, giving a 100% liquid levain that tastes clean and mild.
What is the real difference between 1:8:8 and a 1:1:1 feed?
A 1:1:1 feed keeps one third of the batch as seed and peaks fastest; 1:8:8 keeps one 17th, so it ripens more slowly but with far less inherited acidity.
Can I still make 30g if I only have 15g of culture?
Feed 15g of seed with 14g flour and 14g water, then treat the resulting 43g of levain as your culture instead.