Vermicrop Organics? is proud to introduce PK Boost? to our product line! PK Boost? is a complete organic fertilizer for heavy fruit, flower and vegetable varieties. This mixture of seabird guano, fishbone meal, kelp meal, and potassium sulfate is unequaled in its purity and consistency. Phosphorus and potassium are very important and quickly depleted in the intense flowering cycles of prize-winning plants. Vermicrop? Organics PK Boost? will help heavy fruiting plants achieve their potential and beyond. For best results, use with VermiBloom? depending on your flowering stage and plant variety.