• Skip to main content
  • Skip to after header navigation
  • Skip to site footer

The Sourdough School

DIVERSITY BREAD® || PERSONALISED BREAD || BAKING AS LIFESTYLE MEDICINE

Bake With The Hands Of An Artisan And The Mind Of A Clinician

Set within the walled gardens of Dr Vanessa Kimbell’s beautiful Victorian home in rural Northamptonshire, The Sourdough School is home to the Proven Bread Programme, teaching the art and science of nutrition, the gut microbiome and fermentation in bread. We train bakers to produce Diversity Bread® and healthcare professionals to personalise bread through Baking as Lifestyle Medicine. Arrange a conversation today.

WhatsApp: +44(0)7813308301
[email protected]
Follow on Instagram

Book A Consultation
  • Facebook
  • Instagram
  • Pinterest
  • X
Student Login
  • Workshops
    • Book a Call
    • 2 Day Workshops
    • 3 days Personalised Bread Workshops
    • Tuscan Retreat
    • 12 Week Post Course Support
    • Request a Callback
  • About
    • About The Sourdough School
    • Priority Access: Join the Waiting List
    • Contact Us & FAQ
    • Reviews
    • General FAQ’s about The School
    • Diversity Bread™
    • Where to stay & more
    • Training Bakers & Healthcare Professionals
    • Educational Awards Programme
    • The Team
    • A Social Enterprise
    • Contributors & Guest Tutors
    • What Our Students Say
  • Learn
    • The Diploma – January 2027
    • Request a callback
    • Graduation Recipe Collection
  • What is Proven?
    • Baking as Lifestyle Medicine (BALM)
    • Bread as Preventative Health
    • BALM & Bread in The Blue Zone
    • Proven Bread Documentary
    • Prove it – The Case Studies
    • Proven: Bread Podcast
    • Proven
    • Login
  • Personalised Bread
    • Personalising Bread Using Nutrigenetics
    • Personalisation
    • Personalising Bread
  • Workshops
    • Book a Call
    • 2 Day Workshops
    • 3 days Personalised Bread Workshops
    • Tuscan Retreat
    • 12 Week Post Course Support
    • Request a Callback
  • About
    • About The Sourdough School
    • Priority Access: Join the Waiting List
    • Contact Us & FAQ
    • Reviews
    • General FAQ’s about The School
    • Diversity Bread™
    • Where to stay & more
    • Training Bakers & Healthcare Professionals
    • Educational Awards Programme
    • The Team
    • A Social Enterprise
    • Contributors & Guest Tutors
    • What Our Students Say
  • Learn
    • The Diploma – January 2027
    • Request a callback
    • Graduation Recipe Collection
  • What is Proven?
    • Baking as Lifestyle Medicine (BALM)
    • Bread as Preventative Health
    • BALM & Bread in The Blue Zone
    • Proven Bread Documentary
    • Prove it – The Case Studies
    • Proven: Bread Podcast
    • Proven
    • Login
  • Personalised Bread
    • Personalising Bread Using Nutrigenetics
    • Personalisation
    • Personalising Bread

Sourdough starter Feeding Ratio

Can you explain ratio feeding and do you use it?

Feeding rato is an way to explain that if you put more starter in then your starter is ready quicker and if you put less in then it takes longer, and this affects the rate at which your starter more or less acidic. I’ve always fed my starter just before I go to bed, which is 10pm. I only really use the 1.5.5 because of my routine here, but the 1.1.1 is really useful if you have forgotten to feed you starter and you want to bake a tin loaf. The times change in the summer, and they peak earlier and are useable for less time. It’s not rocket science. But it’s a useful way to think about the process. If I am honest I don’t really weigh my starter, I use a tablespoon and I use a 100g jar, and a 100g scoop. I don’t get excited about a few grams here or these, so my advice is not to get too excited about your precise measurements, instead use your sense of smell and taste and observations.

An explanation.

There is no rig hand wring way to refresh a starter. I just need it to be on point when I want to use it. In the table below I have added the timings for refreshing my white stater at 8pm at night. In almost all of my baking the sourdough Boule I mix around midday so say you might see my white starter is a 1:5:5 As you can see it is on point as I need to make my leaven ( 11am on my schedule) and if I want to use more as the day goes on it stays on point for a long time.

freshening a sourdough starter showing sourdough starter ratios

White sourdough Starter Ratio Feeding Table

Often students ask me why I use white starter. The simple answer is that it suits my teaching schedule, and it fits with the 10 minute technique – both designed to make the dining of baking for domestic baker straight forward. This table is designed to show you how the timings and rate work for my white starter.

RatioStarter (g)Flour (g)Water (g)PeakOn Point until
1:1:175.075.075.03:00 AM8 AM
1:2:245.090.090.05 AM1:00 PM
1:3:333.096.096.07:00 AM3:00 PM
1:5:521.0102.0102.010:00 AM5:00 PM
1:10:109.0108.0108.011:00 AM7 PM

Student Login

All reasonable care is taken when writing about health aspects of bread, but the information it contains is not intended to take the place of treatment by a qualified medical practitioner. You must seek professional advice if you are in any doubt about any medical condition. Any application of the ideas and information contained on this website is at the reader’s sole discretion and risk.

  • Facebook
  • Instagram
  • Pinterest
  • X

Terms and Conditions
Privacy Policy

Call +44 (0)7813308301
Email [email protected]

The Sourdough School is Registered in England & Wales: 08412236

BANT member
Lifecode Gx

Copyright © 2026 · The Sourdough School · All Rights Reserved · Website by Callia Web