Cutting Edge Uncle John's Blend (0-0-2)Cutting Edge Uncle John's Blend (0 0 2) Cutting Edge Uncle Johns Blend supplies potassium along with iron in a unique and proprietary formula. Potassium activates enzymes essential for plant growth reproduction and carbohydrate metabolism. Uncle Johns Blend is formulated for use in hydroponics, soilless, continuous feed, drain to waste, and for use in soil. Use as a foliar spray to reduce transplanting stress and to correct potassium deficiencies in