At customhydronutrients.com we carry two high quality, fully water soluble calcium nitrate fertilizers.
YaraLiva Greenhouse/Solution Grade 15.5-0-0 with 19% soluble calcium is a hydrated calcium ammonium nitrate with 1.1% ammonium content.
Haifa Cal PRIME 17-0-0 with 23.5% soluble calcium is anhydrous calcium nitrate with a low 0.3% ammonium content.
Both products are free of chloride and sodium. They dissolve easily in water providing immediately available nitrogen and calcium to plants. Calcium nitrate is ideal for all irrigation, fertigation and precision fertilization systems including hydroponics. In hydroponics, calcium nitrate is commonly included in the ‘A’ fertilizer concentrate along with potassium nitrate and chelated iron compounds. Because of its calcium content, calcium nitrate is incompatible in solution with phosphorus and sulfate containing fertilizers. So to avoid precipitation in the concentrated solutions, always keep calcium separate from phosphorous and sulfur.
Calcium is a “quality nutrient” that enhances yield quality and prolongs vegetable and fruit shelf life. As the mobility of calcium in the plant is limited, it has to be supplied continuously throughout the growth season to keep adequate levels in the plant tissues and to ensure proper development.
Calcium in the plant
Calcium is essential for the building of cell walls. Poor calcium supply interferes with this important function, resulting in distorted growth and deformation of root tips, young leaves, and shoot tips. In addition weaker cells are more susceptible to biotic attacks. Calcium is also involved in enzymatic reactions and in the coordination of inter-cellular processes.
Calcium deficiency is usually shown as localized rot of tissues, and a consequent growth inhibition. Typical symptoms include leaf deformation, leaf tip burn and root tip burn. Calcium deficiency also reduces quality of the harvest, and shortens shelf life.