| The usual doctrine that I've read is "weakly, weekly," usually meaning half- or quarter-strength of any old fertilizer. I've read that people like me who use collected rain water should add some tapwater from time to time to make up for the relatively low levels of calcium in fertilizers. I have wound up most fertilizing less than weekly and can't tell whether it makes a difference. Fertilizing certainly hasn't killed any of my plants. The ones I have in PrimeAgra (I forget the generic term, HECA?) I assume will require fertilizer. -- Bill |