* SIGH *

it is depends on what plants and fertilizer

if you want some guide about inorganic fertilizer, you can check on www.rqsulfates.com

If you are using miracle grow or something similar, mix according to the directions and use it once a week during the active season. Once the leaves fall, stop fertilizing until spring and the buds start to swell. If your soil drains properly, there is no chance to over fertilize. This has always worked for me.

John