Happy Frog, 4 LB, Jump Start Jump Start, 3-4-3, Dry Fertilizer, Ideal For Transplanting Seedlings & Repotting Established Container Plantings, Gentle Formula Is High In Phosphorus, Which Encourages Vigorous Root Development, Mycorrhizae & Bacteria In This Blend Help To Increase Root Efficiency & Break Down Nutrients In The Soil Into A Form Plants Can Use, Contains Calcium Which Builds Stronger Cell Walls, Boosting The Plants Ability To Resist Disease.