# Master Guide for Sourdough Starter Maintenance and Feeding
Sourdough starter isn't just an ingredient; it's a living ecosystem of wild yeasts and lactic acid bacteria (LAB). Exceptional bread starts with the health of this culture, managed through precise feeding ratios and temperature control. 24-26°C Optimum Activity Temp
3.8 - 4.2 Ideal Culture pH
100% Standard Hydration
x2 - x3 Growth at Peak
# Comparison of Sourdough Culture Types
Liquid Starter (100% Hyd.)
The most common choice in modern artisanal baking. Easy to mix and incorporate into final doughs.
- Faster fermentation speed
- More lactic flavor profile (mild)
- Easy to measure and refresh
- Ideal for baguettes and loaves
Stiff Starter (Pasta Madre)
Traditional in Italian baking. Hydration usually around 50%. Known for its strength.
- Slower, more stable fermentation
- More acetic flavor profile
- Greater strength for enriched doughs
- Ideal for Panettone and Brioche
# Understanding Mathematical Feeding Ratios
The ratio represents parts of Inoculum (old starter) relative to Flour and Water. For example, a 1:2:2 ratio means 1 part culture by 2 parts flour and 2 parts water.| Ratio | Recommended Use | Est. Time (24°C) | Key Advantage |
|---|---|---|---|
| 1:1:1 | Daily feeding | 4-6 hours | Quick maintenance |
| 1:2:2 | Pre-bake activation | 6-8 hours | Acidity balance |
| 1:5:5 | Standard baking use | 8-12 hours | Predictable activity peak |
| 1:10:10 | Long-term retard | 16-24 hours | Flexible schedule management |
# Flour Selection for Starter Feeding
Whole Rye Flour
A superfood for wild yeasts. Contains more nutrients and enzymes than wheat.
- Explosive fermentation activity
- Brings deep, earthy aromas
- Maintains acidity levels better
White Wheat Flour
Ideal for those seeking a milder flavor where the starter doesn't dominate the bread profile.
- More neutral and versatile flavor
- Very clear bubble observation
- Less prone to over-fermentation
Signs of a Hungry Starter
If your culture has a dark liquid on the surface (hooch), smells intensely like vinegar or acetone, or collapses very quickly after peaking, it needs a higher feeding ratio (more food) or a lower storage temperature.
# Technical Sourdough Glossary
- Levain
- An intermediate starter prepared from the mother culture intended for use in a specific bread recipe.
- Hooch
- A layer of alcohol and water that accumulates when a starter has exhausted its food source. It's not harmful but indicates hunger.
- Activity Peak
- The moment of maximum expansion and yeast population density. The ideal point for mixing your bread dough.
- Lactic Acid Bacteria (LAB)
- Microorganisms responsible for producing organic acids that provide characteristic flavor and improve shelf life.