FoxFarm Cultivation Nation Cal-Mag | 32oz

Cultivation Nation Line Calcium and Magnesium Supplement, 32oz

Fruiting and flowering plants pull calcium and magnesium out of solution faster than the vegetative stage does, and a feeding program that doesn't account for that jump can end up with deficiency symptoms even on an otherwise well-fed plant. FoxFarm Cultivation Nation Cal-Mag is a liquid supplement built to cover that added demand, layered onto the Grow, Micro, and Bloom feeding steps as plants move into fruiting and flowering.

The 32oz size gives growers a larger supply for running Cal-Mag through the fruiting stage.

Key Features & Benefits

• Calcium and magnesium supplement — addresses the deficiency risk that shows up as fruiting and flowering demand for Ca and Mg increases.
• Matched to the Cultivation Nation line — layered onto Grow, Micro, and Bloom rather than replacing any of the three.
• Liquid, easy to mix in — measured into an existing feeding or watering routine without a separate procedure.
• Works across scale and system type — suited to hydroponic, soil, and both small and large growing operations.

Who Should Use Cultivation Nation Cal-Mag

Growers running the Cultivation Nation program into fruiting and flowering, when calcium and magnesium demand climbs, are the fit for this supplement, particularly in fast-growing crops or setups using reverse-osmosis or soft water that carries little calcium or magnesium on its own.

About Fox Farms

FoxFarm has produced soil and liquid plant foods out of Humboldt County, California since 1984, and its Cultivation Nation Cal-Mag supplement rounds out the line's core Grow-Micro-Bloom sequence for the fruiting and flowering stage.

Frequently Asked Questions

Why do fruiting and flowering plants need extra calcium and magnesium?

Both elements support cell wall strength and chlorophyll production, and demand for them rises as a plant shifts energy into fruit and flower development. A feeding program built mainly around N-P-K can leave that added demand unmet without a dedicated supplement.

When should I start adding Cal-Mag to my Cultivation Nation program?

Introduce it as plants move into fruiting and flowering, when calcium and magnesium demand climbs above what the base Grow, Micro, and Bloom steps are built to supply. It's meant to run alongside those steps rather than in place of them.

Is Cal-Mag necessary if I'm using reverse-osmosis or soft water?

Reverse-osmosis and naturally soft water carry little to no calcium or magnesium on their own, which raises the odds of a deficiency showing up during heavy fruiting or flowering demand. A Cal-Mag supplement is a common fix in exactly that situation.

Does Cultivation Nation Cal-Mag work in hydroponic systems?

Yes, it's formulated for hydroponic, soil, and soilless growing environments across both small and large-scale operations. Follow the Cultivation Nation feeding schedule for the dilution rate that matches the system.