I have been a happy Jack’s Classic consumer since it’s introduction in 1997.
I used the Dynamic Duo on many crops. Very cost effective. I use it with every watering, and feed until harvest. Depending on container size and indoors or outdoors etc., I use from ¼ teaspoon per gal to 1 tsp per gallon. And I like to see how much they can use in flowering by gently pushing the dosage up.
Several years ago I stopped using Bloom foods entirely. I now use Jack’s Citrus FeED only, at the same dosage as with Dynamic Duo. It works well for me.
I grow in ProMix BX or HP with extra vermiculite and perlite and powdered dolomite lime added.
I use smallish containers only.