How should I choose Emerald Harvest Cal-Mag (EMHCMG)?

Emerald Harvest Cal-Mag (EMHCMG) should be matched to your growing media, water source, crop stage, feeding style, and pH/EC monitoring plan. Choose the exact size or variant before adding to cart. This page has 3 purchasable options, and price, stock, weight, and dimensions can change by size.

Can Emerald Harvest Cal-Mag (EMHCMG) ship in the United States?

Toledo Indoor Garden ships eligible products within the United States. Available shipping options, rates, and estimated delivery timing are calculated during checkout from the selected cart and destination address.

What sizes does Emerald Harvest Cal-Mag (EMHCMG) come in?

Emerald Harvest Cal-Mag (EMHCMG) is available in 3 options: Quart, 1 Gallon, 6 Gallon. Select your preferred size on the product page to see pricing and availability.

What is the return policy for Emerald Harvest products?

Toledo Indoor Garden accepts free 30-day parcel returns on unused, unopened Emerald Harvest products in original packaging after return authorization. Freight, LTL, oversized, special-order, or commercial items may require customer-paid return freight unless the item arrived damaged or defective.

Emerald Harvest Cal-Mag (EMHCMG)

SKU: EMHCMG-Quart

Size: Quart

$12.99

$46.15

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Available to Order

Inventory may be in-store or supplier warehouse. Call 419-725-2450 to confirm availability, handling timing, or shipping.

Questions? Call 419-725-2450

Quick answer

Emerald Harvest Cal-Mag (EMHCMG) should be matched to your growing media, water source, crop stage, feeding style, and pH/EC monitoring plan.

Best fitGrowers building a nutrient program around a specific media type, water source, and crop stage.

Check before orderingChoose the exact size or variant before adding to cart. This page has 3 purchasable options, and price, stock, weight, and dimensions can change by size.

Grower tipStart from the label or feed chart, measure pH and EC, and increase strength only after plants show they are handling it.

Shopping guidance from Toledo Indoor Garden. Prices, availability, shipping rates, weights, and dimensions are verified during checkout.

Emerald Harvest Cal-Mag

Cal-Mag:
USE CAL-MAG SUPPLEMENT TO:

Reduce the risk of calcium or magnesium deficiencies.
Promote chlorophyll production in plants to keep them green and healthy vigorous.
Activate enzymes in plants that help plants uptake nutrients.

Keep your plants productive and green in any growing medium with this calcium-magnesium supplement. Containing top-quality ingredients, Cal-Mag is designed to nourish crops with extra calcium and magnesium and create the right conditions for abundant flowering and a heavy yield. This is especially important when growing in some media, such as coco coir, but any garden can benefit. Growers use calcium-magnesium supplements to correct nutritional deficiencies inherent to some popular growing media. Calcium supports growth and encourages plant development, while magnesium is essential for chlorophyll production, so the garden takes enough energy from light. Magnesium also helps to build the enzymes plants need to uptake nutrients. Emerald Harvest’s Cal-Mag also contains kelp, which is a rich, natural source of nutrients that can be beneficial for crops.

Cal-Mag Supplement
Suitable for All Stages
Application: 1-2 mL/L
Genuine Emerald Harvest product
Brand: Emerald Harvest
Category: Nutrients & Fertilizers > Cal-Mag

SKUEMHCMG

BrandEmerald Harvest

UPC10859041005904

Weight10.61 lbs

Dimensions6 x 5 x 11 in

Sold Aseach

TypeCal-Mag Supplement

IngredientsCal-Mag is designed to nourish crops with extra calcium and magnesium and create the right conditions for abundant flowering and a heavy yield

Made InUSA

NotesProfessional nutrient line manufactured in California

NPK2-0-0

Growth StageAll Stages

Application Rate1-2 mL/L

Derived FromCalcium nitrate, magnesium nitrate, iron EDTA