PK Boosters

PK Boosters are concentrated bloom enhancers that deliver extra Phosphorus (P) and Potassium (K) during the flowering stage, when plants need them most. These nutrients work together to drive bigger flowers, denser fruits, and heavier harvests, giving growers the push required for maximum yield and quality. Easy to use alongside your base nutrients, most PK boosters slot into any feeding schedule and are suitable for soil, coco, and hydro systems.

Phosphorus (P):

• Promotes strong flower initiation and development for bigger yields

• Improves root energy transfer, improving nutrient uptake for faster, more vigorous growth

• Enhances plant metabolism and resilience during bloom for stronger plants that can carry heavier fruits and flowers

Potassium (K):

• Increases flower and fruit density for heavier harvests

• Boosts flavour and aroma, for maximised crop quality

• Strengthens plants against stress and disease during late growth, reducing the risk of harm or damage to your crop

At Greens Horticulture, we stock a wide range of PK boosters from trusted brands, backed with expert advice to help UK growers get the best from every harvest. With the right booster, you’ll see larger, higher-quality yields and more consistent results — all available now at competitive prices and with fast UK delivery from Greens Horticulture.