Increase the root growth rate of your plants, and promote the intake of potassium, nitrogen, and iron using the Cyco XL. The Cyco XL Growth Stimulant is intended to be used in the earlier stages of your plants growth, after week 3. It will rapidly increase root growth and the production of root hairs for water and nutrient absorption. Derived from Super Phosphoric acid, Cyco XL is produced from phosphates reacting with sulphuric acid. Purified phosphates are created from the acid reacting with alkaline salts.