I have used MG liquid with 12-4-8 and a little of the blue crystal 15-30-15 with great results. However I was leary of their soil so I have spent more money there buying roots and mixing SS which works real well.
However My neighbor who I taught how to grow is tighter then I am and he used MG moisture control. He transplant into a five gallon bucket, puts them in flower and they take off like a big ol dog. They grow tall, bushy with green leaves, almost too green and it lasts almost all the way through flower.
I thought it was a fluke the first time but Im sold now. Pricewise, its great deal