Many of my second leaf apples are showing 1-2 bud clusters. I’m good with that. The Wickson crabs have clusters at every bud break. How much is too much fruit? I’m in central Ia on very fertile and deep soils. Trees are on 25-30% Geneva rootstocks which equals 50% from past experience with b9 sized rootstock.
Its a personal decision, there is no one right answer. I’d leave about 20 Wicksons and one fruit per cluster on the others given how few clusters there are.
Scott