Jack's Nutrients 7-15-30 Finish Fertilizer 25lb Active Aqua It has a complex balance

It has a complex balance between water and air which means that it outstrips other substrates

Your plants' roots are the key to your yield size and potency

Rich in phosphorus

Zippers are just as strong as ever

Safe on most surfaces

Jack's Nutrients 7-15-30 Finish Fertilizer 25lb Active Aqua It has a complex balancePromotes strong finished plants. You have always been told to finish strong. This formula is ideally formulated for this purpose to provide your plants with low N, high P, and high K content to keep the whole plant happy to the end of its crop cycle. For use on: Greenhouse and Controlled Environment crops