Yes I've used that often with good results. They need way more frequent fertilizer in pots than in ground. If you want to push growth on a peach fertilize the same as you would a blueberry.

I'd not use the aluminum sulfate on anything. And depending on your media ammonium sulfate could drop the pH lower than ideal for a peach.

I've also used the controlled release type fertilizers in conjunction with a water soluable type. One or two applications a year of controlled and once a week to once a month water soluable depending on how they are growing.

Thanks Fruitnut

Blueboy,

What made you grow it in a pot? Is your soil there a problem? I can tell you my peach trees love the AS. I am a peach newbie but I read somewhere that when the tree is making new leaves but yellowing the older leaves it is a N deficit?

Bam, just ran out of room in my back yard at this point. I have a Rio Red Grape fruit that has been struggling for a while now and I may pull it and replace it with the peach. Ive read the same thing about N2 deficit and it applies to blueberries as well. I potted up a Spring High this past spring and my mix had alittle too much wood in the mix, I was in a rush! Same symptoms, yellowing mature interior leafs. Alittle extra micro life was all she needed! The peach doesnt seem to respond as well to slow release organic ferts. I guess chem fert is the way to go with potted peaches.