here is a link to a good website that may answer alot of your questions on what excactly your fertilizer contains,i think the site probably has every single commercial fert on the market possibly available so you should find your own fert on the site,it also gives a list of the total metals in the product in PPM.
you might find what your plants may be lacking or what there overdosing on! ;)
http://agr.wa.gov/PestFert/Fertilize...iewTable<r=S
