I was looking at the big box home centers for an inexpensive balanced fertilizer and the only thing I can find is a 40 lb. bag of 10-10-10 granulated lawn and garden fertilizer. It doesn't say anything about using it on potted plants, just landscape trees and shrubs. The label says use 2-4 tablespoons for trees up to 12" tall. Is this Ok for Bonsai use? Half strength or full strength? I am guessing it will wash out through the pots pretty quickly since they have a very free draining soil mix in them. Just wondering if anyone else has used this type of fertilizer on containerized plants?