Roots Organics CalMag, 1 gal

Calcium, Magnesium & Sulfur Supplement, 1gal

Fast-growing, heavy-feeding plants can pull through calcium and magnesium faster than a base nutrient program replaces them, showing up as interveinal chlorosis or weak new growth even when the primary N-P-K feed looks adequate. Roots Organics CalMag is a pure, all-natural blend of calcium, magnesium, and sulfur formulated to correct that gap without adding nitrogen, phosphate, or potassium that would throw off a grower's existing fertility ratios.

This 1gal size suits growers running a small number of containers or testing CalMag before committing to a larger volume.

Key Features & Benefits

• Calcium, magnesium & sulfur blend — supports plants during fast growth.
• Free of added N-P-K — supplements without affecting primary fertility ratios.
• Derived from Kieserite & Gypsum — natural mineral sources of calcium, magnesium, and sulfur.
• Pairs with base fertilizers — designed to work alongside Buddha Grow and Buddha Bloom.

Who Should Use This

Growers of fast-growing, heavy-feeding plants who want to supplement calcium and magnesium without altering their base fertility ratios will find CalMag suited to that role.

About Roots Organics

CalMag is formulated within the Roots Organics line, developed by Aurora Innovations, Inc. of Eugene, Oregon since the company's founding in 2000, to pair with the brand's Buddha Grow and Buddha Bloom base nutrients.

Frequently Asked Questions

What's in Roots Organics CalMag?

It's a pure, all-natural blend of calcium, magnesium, and sulfur, derived from Kieserite and Gypsum. Those are natural mineral sources rather than synthetic salts.

Does it contain nitrogen, phosphate, or potassium?

No, it's free of added N-P-K. That keeps it from throwing off a grower's existing fertility ratios when used as a supplement.

What is it typically used with?

It's designed to pair with base fertilizers, including Roots Organics' own Buddha Grow and Buddha Bloom. It's meant to supplement an existing feeding program rather than serve as a standalone nutrient line.

How do I recognize a calcium or magnesium deficiency?

A calcium or magnesium deficiency can show up as interveinal chlorosis or weak new growth, even when a plant's primary N-P-K feed looks adequate. Fast-growing, heavy-feeding plants are more likely to show these symptoms since they pull through calcium and magnesium quickly.