It will work just fine. I use hydro nutes in soil. How old are your plants? You say their in flower I believe, well I would start them off at about half or a little under half of the instructed dose then bump it up every other feeding or so auntill you get up to two TSP. Just moniter to see if you have any Nute burning and if so then flush and cut back.
Adieu
BlueBear Reviewed by BlueBear on . fox farm grow big???? i was wanting to know if i can use fox farm grow big hydroponic plant food for soil grow?and at what recomended dose 2tsp or 3tsp? it says for reciculating system 2tsp and 3tsp for aggessive growth 1/2tsp for folige feeding?any help greatly appriciated!! Rating: 5