Unless you have a soil deficiency, you shouldn't have to fertilize at all.

Agree withe the above. The exception would be if you are growing it in a container.

If its in your lawn, then its probably gets fertilized. Otherwise, just let it do its thing if properly planted.

i like to put it this way ...

its a tree.. not a child.. it never needs to be 'fed' ...

if its in a pot .. let us know.. and we can advise in that regard ... add where you are.. media type.. pot size...etc .. including what kind of tree ...

ken

It's a maple tree in the ground. I live in Oregon, zone 8a to 9a