I have used only one type of tomato food on ganja plants...MG tomato fert. (18-18-21)
If not used in too strong of a dilution it works fine. 1/4 to 1 tsp per gallon of water depending on environmental conditions. I used it for veg stage only.
It is very inexpensive and will certainly produce fat sticky potent buds.
I always flushed the soil thoroughly one week or so before harvest...the buds taste great. I think problems arise with chemicals ferts due largely to using too much, in too strong of a dilution.
I would not claim that the MG is optimum, but it is truly effective.

I got the idea to use MG tomato a long time ago in a grow book by Jorge Cervantes... (If I remember correctly around '83 or '84?)

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