Jack's 5-12-26 Part A
Best soluble nutrient base for growers focused on vigorous vegetative development.
Jack's 5-12-26 Part A is an enhanced nutrient formula specifically developed for the general vegetative growth stages of plants. This improved blend uses entirely soluble and readily available nutrients, offering growers significant flexibility in their feeding strategies. It provides an efficient combination of essential macro, secondary, and micronutrients, making it suitable for a wide array of crop types and various growing conditions. Available in a 25 lb. bag, it serves as a dependable base for promoting vigorous plant development during the vegetative phase.
$96.75
Owner Satisfaction
4.6
/ 5
Category Rank
1791
/ 4425
#1791 in Fertilizers
Price vs Category Average
+57%
Above average
NPK Ratio
51226
/ --
Who it's for
- Budget-conscious cultivators prioritizing cost-effective nutrient solutions
- Commercial growers seeking maximum flower and fruit yields
- Hydroponic gardeners needing clog-free irrigation systems
Who should skip it
- Beginners wanting a simple, all-in-one fertilizer solution
- Gardeners who prefer the convenience of pre-mixed liquids
- Novice growers struggling with precise pH and EC management
Performance breakdown
Nutrient Solubility
Fully dissolves in water to prevent clogged irrigation lines and emitters.
Feeding Versatility
Highly adaptable formula suits diverse crop types and varied growing environments.
Vegetative Support
Potent NPK ratio drives robust leaf and stem development during growth.
Application Efficiency
Quick-release minerals provide immediate nutrient uptake for hungry, fast-growing plants.
Formula Precision
Professional-grade mineral blend ensures consistent results across every feeding cycle.
Storage Convenience
Large 25-pound bag offers great value but requires dedicated dry storage.
Key Specs
NPK Ratio
5-12-26
Package Weight
25 lb.
Nitrogen Content
5%
Phosphorus Content
12%
Potassium Content
26%
Nutrient Availability
Purely soluble and available
Fertilizer Form
Granular
Fertilizer Source
Mineral Based
Features
- Optimized for vegetative growth
- Uses purely soluble nutrients
- Balanced macro, secondary, and micronutrients
- Offers maximum feeding flexibility
- Suitable for many crop types
- Efficient nutrient delivery
What customers say
Cultivators highly value this formula for its exceptional reliability and consistent performance, which supports robust plant health and predictable yields. A major advantage noted repeatedly is its superior solubility. The product dissolves easily and completely, significantly simplifying the feeding routine and ensuring smooth operation for automated systems. This blend of dependable efficacy and user friendliness drives strong customer satisfaction among serious growers.
Know before you buy
No, this formula is designed as a base component. It is typically used in conjunction with other nutrients, such as calcium nitrate, to create a complete feeding program for your plants.
Yes. Because the nutrients are 100% water-soluble, this formula is well-suited for hydroponics, fertigation, and drip irrigation systems without clogging emitters.
The 5-12-26 ratio is specifically optimized for the vegetative growth phase. It provides the necessary macro and micronutrients to support strong stem and foliage development before plants transition to flowering.
No. Jack's 5-12-26 is a mineral-based, synthetic fertilizer. It is designed for precision nutrient delivery rather than organic growing methods.
Since this is a quick-release formula, nutrients are immediately available to the plant upon application. This gives you maximum control over your feeding strategy, allowing you to adjust nutrient levels rapidly based on your plants' current needs.
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$97