05/10/2026
For those beginning a fresh starter this is fantastic advise!
I want to address a comment that came in on my Sourdough Starter Timeline post, because it's a genuinely good question and the kind of thing that can confuse a lot of beginners if left unanswered.
The commenter said: "Neme, I'm not trying to insult your knowledge, but if you have 40g of starter and only feed it 20g of water and 20g of flour, isn't that underfeeding it? In almost 3 years I've never seen 2:1:1."
I really appreciate this kind of engagement, and no offence taken at all. This is exactly the kind of question that deserves a proper explanation rather than a one-line reply.
So let me clarify.
•••
The 2:1:1 ratio in that guide is not a maintenance ratio. It's a new starter ratio, and the distinction matters.
When you're building a starter from scratch, you are working with a very young, very fragile culture. In the early days, the wild yeast population inside the jar is small, unstable, and still establishing itself. The good bacteria are just beginning to find their footing. At this stage, the culture needs to be protected and nurtured, not diluted.
Pay attention here, because this is the part most people miss. When you feed a young starter with too much fresh flour and water relative to what's already there, you dilute the small colony of microorganisms that is trying to establish itself. There simply aren't enough of them yet to work through a large feeding efficiently. The result is a sluggish, inconsistent culture that takes far longer to develop, and that extended timeline is one of the main reasons beginners give up and throw their starter away before it ever had a real chance.
A 2:1:1 ratio, meaning more starter than flour and water, reduces that dilution risk during the early days. It keeps the existing culture concentrated enough to continue developing without being overwhelmed by more food than it can handle. The goal at this stage is to give the starter enough food without diluting the fledgling culture too much.
•••
Now, once your starter is established, everything changes.
A mature, healthy starter with a stable and vigorous population of wild yeast and bacteria can absolutely handle larger feedings. In fact, at that point larger ratios like 1:3:3, 1:5:5, or even higher become not just acceptable but genuinely useful, because they give you more control over timing and help you fit baking into your schedule. A bigger feeding slows the peak down, which is helpful if you want to feed at night and bake in the morning. A smaller feeding speeds it up, which is useful if you want the starter ready in a few hours.
But that flexibility only works when the culture is strong enough to handle it. In the early days of building from scratch, it isn't there yet.
•••
So to directly answer the question: no, 2:1:1 is not underfeeding.
It is deliberately conservative feeding, designed specifically for the early stage of starter development to protect a culture that is still finding its strength. It is different from what you would use for a mature starter, and it was never intended as a long-term maintenance ratio.
This is why context matters so much in sourdough. The same ratio that would be wrong for a mature starter can be exactly right for a new one. Once your starter is consistently doubling, smelling pleasant and tangy, and behaving predictably after every feed, you graduate to maintenance ratios and a whole new set of options opens up.
End of post.
As always, I hope this helps someone.
