Multi Zen 

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House & Garden Multi Zen is a concentrated growth additive whose unique formulation helps to thicken stalks resulting in stronger, more vigorous plants. 

It is formulated to aid in the break down of old root material and nutrients to make them more readily available within the root zone.

Multi Zen also helps plants increase flower sites so you can obtain maximum harvests.

Derived from Ammonium Nitrate, Nitric Acid and Potassium Hydroxide.

Application rate: add to nutrient solution from early vegetative stage throughout the third week of flowering. See label for more information.