Jack’s 15-5-20 (25lbs) Light Controller phosphorus and potassium throughout the

phosphorus and potassium throughout the crop life cycle

long-lasting and with an efficient backflush process

May be used with any nutrient line

and kelp with mineral plant foods to give your garden a quick boost and provide long-lasting

Jack’s 15-5-20 (25lbs) Light Controller phosphorus and potassium throughout thePrefer Tap Water? Allow your plants to drink up this formula designed to provide all the macro, secondary and micro nutrients in a one part system. Specifically formulated for tap, city or well water types with slightly higher alkalinity & pH. This combination of nutrients will lower pH over time while including the extra soluble calcium, magnesium and the right balance of micronutrients.