FoxFarm Cal-Mag (1 qt)

FoxFarm Cal-Mag (1 quart), sold as Gringo Rasta Cal-Mag, is a concentrated supplement that delivers calcium and magnesium for strong cell walls, enzyme activity, and abundant fruits and flowers. This quart size suits smaller gardens, container plants, and indoor setups where precise nutrient management matters.

At a glance

• Type: Liquid calcium and magnesium supplement
• Size: 1 quart
• Calcium: 3%
• Magnesium: 0.9%
• Best for: Small gardens, indoor plants, container growing
• Certification: OMRI Listed and CDFA Organic Input Material
• Derived from: Calcium carbonate, magnesium sulfate, and soy protein hydrolysate

Best for

• Container plants and indoor growing
• Small gardens needing precise dosing
• Preventing weak stems and blossom end rot
• Vegetables, herbs, fruiting plants, and ornamentals
• Certified organic growing

How to use

Add Cal-Mag to your feeding program at the label rate for soil or hydroponic growing. Use it to correct and prevent calcium and magnesium deficiencies that cause weak stems, blossom end rot, and reduced flower quality, improving overall plant vigor and harvest quality.

About Grow Organic

Grow Organic supplies organic and non-GMO seeds, amendments, and plant nutrition products for gardeners who want a chemical-free, productive garden.