I have long been a devotee of Jerry Baker (On The Garden LIne) and I use his "All season Green-up Tonic" on my garden, both in the ground and potted plants and my peppers seem to love it.

mix it all together and apply with a 20 gal hose-end lawn sprayer (the hose end sprayer will hold about 2/3rds of this mix. I use the entire batch on my 35 x 90 garden.