Haifa Cal Prime Calcium Nitrate
Best concentrated calcium source for professional hydroponic and soilless growers.
This is the gold standard for hydroponic growers who need precise, high-potency nutrition without the risk of ammonium buildup. By stripping away the filler, you get a cleaner, more efficient feed that thrives under intense light, though it demands a more disciplined hand than standard, forgiving fertilizers.
$41.75
at
Custom Hydro
Who it's for
- Hydroponic gardeners using precise, residue-free irrigation systems
- Farmers seeking rapid nutrient absorption for faster crop growth
- Commercial growers protecting high-value produce from physiological disorders
Who should skip it
- Gardeners preferring simple, all-in-one fertilizer tank mixes
- Outdoor growers managing sandy soils prone to nutrient runoff
- Budget-conscious hobbyists needing low-maintenance, shelf-stable fertilizer options
Performance breakdown
Nutrient Concentration
Industry-leading calcium levels maximize efficiency for high-demand hydroponic systems.
Solubility Speed
Granules dissolve rapidly, preventing clogs in sensitive automated irrigation lines.
Ammonium Purity
Negligible ammonium content protects sensitive root zones from nutrient uptake stress.
Application Versatility
Adapts seamlessly from precise hydroponic injection to standard foliar spray applications.
Handling Efficiency
High concentration reduces the physical volume required for large-scale crop management.
Environmental Stability
Maintains consistent performance and plant safety even under intense sun exposure.
Key Specs
Fertilizer Grade
17-0-0 with 23.5% calcium
Total Nitrogen (N)
17.0%
Calcium soluble in water (Ca)
23.5%
Calcium Oxide (CaO)
33.0%
Ammoniacal Nitrogen (N-NH4)
0.3% maximum
Insoluble matter
0.03%
Appearance
White granules
Hazard Classification
UN1454, OXIDIZER
Container Weight
55 lb.
Water Soluble
True
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