Dyna gro is cool, I used that for a while, the best nutrients I have ever used for growing marijuana are the 3 part natural system from humboldt plant fertilizers. The grow (giddy up and grow) and the bloom (bigazz bloom) oh yeah, and the stuff for transitioning from the veg to the flower stage (nutrifier). I found it after using all the other name brands, but wanted to cut my budget down and save $