I didn't buy the grow because my plants are already 4ft tall and are in the transitional phase to flowering. I was told i didn't HAVE to get the floragrow. My most important question is whether or not i hurt the plants by not mixing the bloom and micro and still watering them with each one. OH!, and i accidentally got the flower wet with either the bloom or micro(cant remember which one). Could it burn the leaves if the diluted ferts touched?