Jack's Finish
Best professional-grade fertilizer for maximizing flower and fruit development.
This high-potassium formula is the secret weapon for pushing plants through their final growth phase to maximize yield and bloom density. It requires a bit more technical oversight than all-purpose feeds, but for professional growers, the precision it brings to the harvest stage is unmatched.
$83.99
at
Perris Hydroponics
Who it's for
- Serious growers aiming for maximum flower density and fruit quality
- Commercial cultivators using automated irrigation and hydroponic systems
- Experienced gardeners who prefer precise control over nutrient concentrations
Who should skip it
- Novice gardeners intimidated by precise weighing and mixing requirements
- Casual growers seeking a simple, all-in-one fertilizer solution
- Minimalists looking for a standalone product rather than a system
Performance breakdown
Bloom Potency
High potassium levels drive exceptional flower and fruit development.
Solubility Speed
Water-soluble powder dissolves rapidly for immediate nutrient uptake.
Application Precision
Quick-release formula allows growers to fine-tune late-stage plant nutrition.
Professional Utility
Bulk 25lb packaging meets the demands of high-volume horticultural operations.
Nutrient Balance
Specialized NPK ratio targets the specific needs of finishing crops.
Logistical Efficiency
Rapid local pickup availability minimizes downtime for busy professional growers.
Key Specs
NPK Ratio
7-15-30
Nitrogen
7%
Phosphorus
15%
Potassium
30%
Package Weight
25 lb
Fertilizer Form
Water Soluble Powder
Release Type
Quick Release
Fertilizer Source
Mineral Based
Season of Application
Fall
Target Plant Type
Flowers, Vegetables
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