Roots Organics HPK 0-4-3 Liquid Bloom Booster
Roots Organics HPK is a minimally processed liquid bloom booster designed to support flower formation, fruit development, and mid-bloom weight gain. Made with natural phosphorus and potassium sources, HPK helps provide the bloom-stage nutrition plants need during the middle of the flowering cycle.
Formulated with seabird guano, phosphate rock, and langbeinite, Roots Organics HPK delivers phosphorus to support flower and fruit development, along with potassium to encourage plant strength, density, and overall bloom quality. It is a strong companion product for soil, soilless, coco, and hydroponic gardens where growers want targeted phosphorus and potassium support without overcomplicating their base nutrient program.
Key Benefits
Mid-Bloom Flower & Fruit Support
Designed to help enhance flower size, fruit development, and bloom-stage performance during the critical middle flowering period.
Natural Phosphorus & Potassium Sources
Provides bloom-focused nutrition from seabird guano, phosphate rock, and langbeinite.
Supports Weight, Density & Crop Quality
Helps plants access additional phosphorus and potassium when demand increases during flowering and fruiting.
Great for Soil & Hydroponic Systems
Use in potting soil, soilless mixes, coco-based gardens, and hydroponic nutrient programs according to label directions.
Useful Separate PK Booster
Allows growers to add phosphorus and potassium support separately from base nutrients, which can be helpful when managing feeding strength in coco, soil, or hydroponic systems.
Pairs with Roots Organics Nutrients
Works well alongside Buddha Bloom, Trinity, CalMag, Extreme Serene, and other Roots Organics liquid nutrients as part of a complete feeding schedule.
How to Use Roots Organics HPK
Flowering Stage:
Use during the middle of the flowering cycle when plants need additional phosphorus and potassium support.
Soil & Soilless Gardens:
Mix with water according to label directions and apply as part of your regular bloom feeding program.
Hydroponic Use:
Add to your reservoir according to the Roots Organics feeding schedule and monitor pH and nutrient strength regularly.
Coco Coir Gardens:
Use carefully alongside your base nutrients to avoid overapplying potassium. Adjust rates based on plant response, water quality, and the rest of your feeding program.
Best Practice:
Shake well before use, mix thoroughly with water, and introduce gradually when adding HPK to an existing nutrient program.
Always follow the product label and Roots Organics feeding schedule for exact application rates based on plant type, growth stage, and growing system.
Please note: Roots Organics HPK may vary slightly by production batch, and the guaranteed analysis may be listed as either 0-4-3 or 0-5-4. Both formulations are genuine Roots Organics HPK and are intended for the same bloom-supporting use.
