gaberoo

Agree Richard. I really didn't read all of the tiny print on the bottle of Superthrive (I bought it on faith because landscape people said that's what many nurseries used in order to guarantee plants...I haven't actually verified this with any nurseries though). It has also gotten some rave reviews by many hydroponics people (I won't ask what exactly they grow with it...I'll just assume it is vegetables and fruits).

One of the most complete (when it comes to micronutrients) fertilizers I've heard experienced plant people talk about is palm fertilizer (it is rather expensive though). I'm sure every plant has its own ideal "mix" though.
For instance, some mango people recommend only potassium for the trees (at least during most of the fertilization schedules).

For my own scant banana collection I just use the "superfruiter" that I buy in 50 lb bags at my local fertilizer company (Atlantic Fertilizer Company) and I'm not even very constant in its use (not too worried about getting any bananas yet...more focused on the rest of my yard and happy enough that the banana plants are growing well).

Back to Superthrive...it is expensive at around 120$ per gallon (but I feel better if I can give the young tropicals a better chance at surviving occasional winter frosts till they can become established and survive on their own). I wasn't aware of that "exhaustion" problem with using it too frequently so I'd appreciate any references you have so that I may look into this problem further.