Rapid start enhances your growing experience by delivering a powerful blend of premium plant extracts, amino acids and nutrients generating explosive root growth. Using rapid start stimulates prolific root branching and development of fine root hairs that increase nutrient uptake and grow healthier, whiter roots. Using rapid start will make your plants explode! use during the entire growing cycle in all types of growing media, including coco. Rapid start, strong finish; bigger is always better!