Jack's 15-0-0 Cal Nit Part B
Best calcium supplement for growers using two-part nutrient feeding systems.
Jack's 15-0-0 Cal Nit Part B is a vital component for growers employing a two-part nutrient feeding strategy. This formulation delivers a highly soluble and readily available source of calcium, which is crucial for robust plant health and structural integrity. It is made with very pure ingredients, ensuring that both the calcium and nitrate nitrogen are completely available for immediate plant uptake. This product is designed to integrate seamlessly with the corresponding Part A, providing balanced nutrition specifically during active growth phases. It is available in a 25 lb. package size.
$60.00
Owner Satisfaction
4.7
/ 5
Category Rank
50
/ 4425
#50 in Fertilizers
Price vs Category Average
-3%
Below average
NPK Ratio
1500
/ --
Who it's for
- Serious cultivators using the full Jack's professional nutrient system
- Gardeners growing calcium-hungry fruiting crops like tomatoes
- Growers needing immediate vegetative growth and rapid green-up
Who should skip it
- Beginners seeking a simple, all-in-one fertilizer solution
- Users prone to mixing errors or incompatible nutrient combinations
- Gardeners who prefer a low-maintenance, set-and-forget feeding routine
Performance breakdown
Nutrient Solubility
Dissolves rapidly without leaving behind problematic sediment or residue.
Calcium Bioavailability
Highly refined formula ensures immediate uptake for structural plant health.
System Compatibility
Engineered for seamless integration within professional two-part feeding regimens.
Purity Standards
High-grade synthetic ingredients minimize impurities for consistent crop performance.
Nitrogen Delivery
Nitrate nitrogen provides a quick-release boost for active growth phases.
Handling Convenience
The 25 lb bag is manageable for mid-sized commercial operations.
Key Specs
NPK Ratio
15-0-0
Package Weight
25 lb
Nitrogen Content
15%
Phosphorus Content
0%
Potassium Content
0%
Secondary Nutrient
Calcium
Solubility
Very soluble
Nutrient Type
Calcium Nitrate
Features
- Provides highly soluble calcium source
- Designed for two-part feeding systems
- Contains readily available nitrate nitrogen
- Formulated with very pure ingredients
- Ensures complete nutrient availability
- Integrates seamlessly with Part A
What customers say
Customers highly value Jack's 15 0 0 Cal Nit Part B for its exceptional quality and reliable performance. Growers find this specialized nutrient dissolves easily, integrating smoothly into existing feeding schedules for straightforward nutrient management. The product consistently delivers predictable results, supporting healthy plant development and robust yields across different growing environments. Users agree that this professional grade consistency provides excellent value, confirming its status as a highly effective and dependable part of their nutrient regimen.
Know before you buy
Yes, Jack's 15-0-0 Cal Nit is designed specifically as a Part B component. It must be used in conjunction with a compatible Part A fertilizer to provide a complete, balanced nutrient profile for your plants.
Calcium is essential for building strong cell walls and structural integrity, while the nitrate nitrogen provides an immediate, easily absorbed energy source. Using this combination helps prevent common deficiencies like blossom end rot and supports vigorous growth.
Yes, this product is highly water-soluble and formulated with pure ingredients, making it ideal for hydroponics, drip irrigation, or any fertigation system where preventing clogs is a priority.
No, you should never mix Part A and Part B concentrates together in the same stock tank. Doing so can cause the nutrients to precipitate and lock out, making them unavailable to your plants; always dilute them into your water reservoir separately.
No, this is a specialized 15-0-0 formulation. It is strictly intended to supply nitrogen and calcium, allowing you to fine-tune your nutrient ratios by adjusting your Part A and Part B dosages independently.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$60