GH General Organics CaMg+ 6 Gallon

Calcium and Magnesium Supplement for Deficiency Correction, 6 Gallon

Calcium and magnesium deficiencies show up often in fast-growing plants, especially in soilless and hydroponic setups where these secondary nutrients aren't always present in sufficient amounts in a base feeding program. General Organics CaMg+ supplies both from oyster shell, dolomite lime, and plant extracts, giving growers a way to correct or prevent deficiencies without switching their entire nutrient program.

The 6 Gallon size fits larger gardens or commercial growers who use CaMg+ as a regular part of their feeding program.

Key Features & Benefits

• Calcium and magnesium supplement — made from oyster shell, dolomite lime, and plant extracts.
• Corrects and prevents deficiencies — addresses the interveinal chlorosis and stunted growth common with cal-mag shortfalls.
• Root drench or foliar application — apply through the root zone or as a foliar spray depending on how quickly correction is needed.
• Safe for edible crops — suited to fruiting and vegetable plants as well as ornamentals.

Who Should Use CaMg+

This supplement fits growers running soilless or hydroponic systems, where calcium and magnesium deficiencies show up more often than in mineral-rich garden soil. It also suits any grower who's noticed the yellowing between leaf veins that signals a cal-mag shortfall, regardless of growing method.

About General Hydroponics

CaMg+ is part of General Hydroponics' General Organics line, formulated from natural mineral and plant-derived sources rather than the synthetic calcium-magnesium supplements common elsewhere in the category. It's sold in sizes from a 32oz bottle up to multi-gallon case packs for growers feeding larger numbers of plants.

Frequently Asked Questions

How do I know if my plants need a calcium and magnesium supplement?

The most common sign is interveinal chlorosis — yellowing between the leaf veins while the veins themselves stay green — often starting on newer growth. Soilless and hydroponic growers see this more often than soil growers, since native soil typically supplies more calcium and magnesium than a soilless mix or nutrient solution does on its own.

Can I apply CaMg+ as a foliar spray instead of through the roots?

Yes, it can be applied either as a root drench through your regular watering or nutrient solution, or as a foliar spray directly on the leaves. A foliar application generally corrects a visible deficiency faster, while a root drench works better as ongoing prevention.

Is CaMg+ safe to use on food crops?

Yes, it's formulated to be safe for edible crops as well as ornamentals, which is standard for a calcium-magnesium supplement in this category. As with any supplement, follow label dilution rates rather than applying it at full strength.

What's the difference between the 2.5 Gallon case pack and buying single containers?

The case pack bundles two 2.5 Gallon containers together, which works out to a lower per-gallon cost for growers who are going to use that much anyway. It's aimed at larger gardens or commercial operations running CaMg+ on a regular schedule rather than occasional use.

Do I need CaMg+ if I'm already using a complete base nutrient?

Many base nutrient programs include some calcium and magnesium, but not always enough to prevent deficiencies in fast-growing or heavy-feeding plants, especially in soilless media. If you're seeing signs of a cal-mag shortfall despite a complete base program, adding CaMg+ is the standard next step rather than switching your whole feeding program.