I use whatever.
Homemade weed tea, homemade fish fertilizer, random doses of urine
, different elements, copper sulfate, potassium sulfate, bone meal, feather meal, azomite, kelp meal (supposedly only supposed to apply once a year), cottonseed meal, fish meal, manganese sulfate, zinc sulfate, calcium carconate, and calcium sulfate.
but you don't have to do all that. A dose of fruit fuel or lawn fertilizer monthly will be excellent!
