Calcium nitrate is a widely used fertilizer in horticulture, valued for its dual role as a source of calcium and nitrogen. It promotes strong cell walls, leading to sturdier crops and improved shelf life of fruits. The nitrogen in nitrate form is quickly absorbed by plants, stimulating growth.

Calcium nitrate is highly effective in preventing calcium deficiencies, such as blossom end rot in tomatoes and tip burn in lettuce. It is highly soluble in water and can be applied through irrigation systems or foliar feeding.

Proper storage and use according to safety guidelines are necessary to ensure its effectiveness.