first i would start by reading the directions. my best guess is that you would use the grow during the veg stage and the flower during the, er flower stage? best guess.

-shake
headshake Reviewed by headshake on . When do i switch food? Hey guys, Im currently using and will only use Pure Blend Pro Gro and Pure Blend Flower. My question is when do i switch from using the Gro formula and use the Flower one? I just started to force 2 days ago. Since ive switched to 12/12 my plants have just exploded with new undergrowth and have sprouted between 1 and 5 inches. (only 2 dark periods so far) Thanks Rating: 5