Blast 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. Directions for use: Use with every watering throughout the Vegetative phase and weeks 1-3 of the Flowering phase. Mix well and adjust pH accordingly. Shake well before each use.