Success Nutrients Blast Off: Root Structure and Growth - 250 ML - Case of 8Blast Off is formulated to promote root and plant growth in the Vegetative and beginning part of the Flower phase. Keep in mind, root mass is fruit mass. Blast Off is very effective in both Soil and Hydroponic gardens. Use in conjunction with Success Nutrients plant food and supplements. Nutrient Composition Macronutrients (N) 1 (P) 0. 5 (K) 1 (Ca) 0 (Mg) 0 (S) 0 Micronutrients (B) 0 (Cu) 0 (Fe) 0 (Mn) 0 (Mo) 0. 001 (Zn) 0 (N) Nitrogen Building block