GH KoolBloom
Best bloom booster for growers seeking larger, heavier late-stage harvests.
This concentrated bloom booster is the heavy-hitting finisher your garden needs to pack on final weight and density. You sacrifice a gentle approach for a potent phosphorus-potassium punch, but the result is undeniably larger, more mature harvests that make the late-stage effort worthwhile.
$14.48
at
CapCityHydro (Capital City Organics)
Who it's for
- Quality-focused cultivators wanting to enhance harvest flavor and oil production
- Commercial growers aiming for maximum flower density and size
- Budget-conscious gardeners seeking long-lasting, cost-effective nutrient solutions
Who should skip it
- Beginners uncomfortable with frequent pH and EC monitoring
- Novice growers prone to accidental over-fertilization
- Busy gardeners wanting a quick, hassle-free mixing process
Performance breakdown
Bloom density
High phosphorus content drives significant weight and density in final harvests.
Nutrient concentration
Potent mineral-based formula requires minimal product for maximum late-stage impact.
Solubility
Water-soluble powder dissolves quickly for efficient nutrient uptake in irrigation systems.
Ripening efficiency
Accelerates the final maturation phase for consistent and high-quality yields.
Application versatility
Effective across a wide range of plants from vegetables to shrubs.
Ease of storage
Dry powder format offers a stable shelf life for long-term use.
Key Specs
NPK Ratio
2-45-28
Nitrogen
2%
Phosphorus
45%
Potassium
28%
Fertilizer Form
Water Soluble Powder
Fertilizer Source
Mineral Based
Release Type
Fast Release
Container Weight
2.2 lb
Water Soluble
Yes
Target Plant Types
Lawn, Vegetables, Flowers, Trees and Shrubs, Houseplants
Know before you buy
Still have a question?
Ask Metto anything about the GH KoolBloom before you decide.
