Grow More® Flowering Cal-Mag — 6 gal

Nitrogen-Free Calcium and Magnesium Supplement, 6 gal, for Bloom-Phase Yield

Most bloom-phase feeding programs deliberately cut nitrogen to favor reproductive development, but a standard Cal-Mag supplement often reintroduces nitrogen right back in, working against that intent. Grow More Flowering Cal-Mag is a proprietary, 100% nitrogen-free calcium and magnesium blend built specifically for fruiting and flowering crops, letting growers correct Ca-Mg levels during bloom without adding nitrogen that could push unwanted vegetative regrowth.

Available in 6 gal, Flowering Cal-Mag delivers 2.0% calcium and 1.0% magnesium from a proprietary blend of calcium and magnesium citrate, glucoheptonate, carbonate, and acetate sources for strong solubility and bioavailability.

Key Features & Benefits

• 100% Nitrogen-Free: Allows precise Ca-Mg correction during flowering and fruiting without the risk of nitrogen-driven vegetative regrowth.
• Enhances Fruit and Flower Yield: Adequate calcium and magnesium during reproductive development support cell division, fruit set, and flower and fruit structural integrity.
• Prevents Blossom End Rot: Delivers immediately available calcium to correct and prevent this classic calcium-deficiency disorder in fruiting crops.
• Improves Water and Nutrient Uptake: Adequate calcium supports root membrane function, improving overall water and nutrient absorption.
• Multi-System Compatible: Formulated for coco coir, soil, and hydroponic growing systems alike.

Who Should Use This

Growers who need to supplement calcium and magnesium specifically during flowering and fruiting, without adding nitrogen to their program, are the direct fit — particularly in coco coir (where cation exchange competes for calcium), in RO or soft-water hydroponic systems, and in bloom-phase programs where additional nitrogen would work against the intended feeding strategy.

About Grow More Inc.

Grow More Inc., founded in 1918 in Hollywood, California as National Chemical Company and now headquartered in Gardena, California, builds Flowering Cal-Mag into its Mendocino bloom-phase supplement lineup alongside Hawaiian Big Bud and Amber Humic.

Frequently Asked Questions

Why use a nitrogen-free Cal-Mag during flowering?

Most flowering and fruiting crops run a reduced-nitrogen program during bloom to direct energy toward reproductive development instead of vegetative growth. Standard Cal-Mag supplements often carry nitrogen that partially works against that approach, while Flowering Cal-Mag supplies calcium and magnesium without it.

How is this different from Grow More Mendocino N-Cal-Mag?

N-Cal-Mag contains 2.2% nitrate nitrogen alongside calcium and magnesium, making it a better fit for vegetative growth phases. Flowering Cal-Mag is 100% nitrogen-free, making it the appropriate choice once nitrogen should be minimized during flowering.

What causes blossom end rot, and how does Flowering Cal-Mag prevent it?

Blossom end rot comes from inadequate calcium at the developing fruit tip during rapid cell division. Because calcium moves poorly within the plant, it has to be continuously supplied through the root zone, and Flowering Cal-Mag delivers immediately available calcium to correct that shortfall.

Can Flowering Cal-Mag be used as a foliar spray during flowering?

Foliar application late in flowering isn't generally recommended, to protect flower and fruit quality. For acute deficiency during the flowering phase, root drenching is the preferred method instead.