Cal Mag Additives

Calcium and Magnesium additives are specialized nutrients designed to compensate for deficiencies in most nutrient and fertilizer schedules. Calcium and Magnesium (often referred to as Cal-Mag) is almost always needed when using pure, distilled, or reverse osmosis water. Calcium and Magnesium are the most abundant minerals in tap water however much of it is not chelated enough to be absorbed by plants. The majority of the PPM, or EC reading, you obtain from a measuring device is cal-mag.

Calcium, an essential part of the plant’s cell wall structure, improves the absorption of other nutrients by the roots and their translocation within the plant. It activates a number of plant growth-regulating enzyme systems; helps convert nitrate-nitrogen into forms needed for protein formation; and contributes to improved disease resistance.

Magnesium also helps to activate specific enzyme systems. Enzymes are complex substances that build, modify or break down compounds as part of a plant’s normal metabolism.

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  1. $12.38

    Cal-Mag Plus is a specialized calcium, magnesium & iron, plant supplement designed to compensate for deficiencies in some commercial and hydroponic nutrient programs. Cal-Mag Plus also compensates for the natural calcium draw of coco coir fiber. Learn More
  2. $12.19

    Out of stock

    Gold Label Ultra MG is a nitrogen rich source of magnesium additive for all plant development stages. Ultra MG has been specifically developed to perfectly balance your NPK and micro nutrients in all stages of vegetative and generative development. It contains high quality magnesium chelate which is easily absorbed by your crop in a wide pH range. Use continuously on inert media and as a replenishment on soil and soilless media. Learn More
  3. $24.15

    Vegamatrix Boost is designed to be a stand-alone Ca-Mg supplement compatible with all base nutrients Learn More
  4. $13.60

    Keep your plants productive and green with Cal-Mag, Emerald Harvest’s calcium-magnesium supplement. Cal-Mag helps regulate plant growth and productivity and ensures essential chlorophyll levels when growing in coco coir and other media. Learn More
  5. $20.00

    This product is provided as an additive in situation in which the amount of calcium present in the water is below recommended levels. Learn More
  6. $17.60

    NPK 3-0-0 Provides essential macrominerals to your plants. Helps with deficiencies in soil and water. Increase photosynthetic balance in your plants with a boost of nitrogen level. Improves nutrient absorption rates to a plants vascular system. Can be used as either an additive to your nutrient lineup or as a foliar spray. Learn More
  7. $31.43

    Using liquid calcium to adjust pH, Olympus Up is also adding more calcium to your plants cell structure! The excess Olympus Up serves as a food source increasing aeration and microbial activity. Learn More
  8. $18.24

    Demeter's Destiny adds the calcium you need in your plants diet! The calcium will not only help your plant grow, but will promote enzymatic functions, feed microbes and create needed nutrient! Learn More
  9. $9.05

    Herculean Harvest Liquid Bone Meal Calcium Phosphate will boost your plants health with the use of Calcium Phosphate.Calcium is a must for supplying plant growth energy to sustain life and growth, and also promotes strong cell development! Learn More
  10. $15.33

    A Calcium-Magnesium supplement that is optimized for your crop through the right ratios of chelated iron and 20 L-form amino acids. Learn More
  11. $30.00

    Correct common plant deficiencies and assist in plant growth and development with this calcium, magnesium, and iron supplement. Learn More
  12. $13.33

    Micronized Compost Tea is a blend of all-natural ingredients that can be combined with any fertilizer program to help build healthy soil, allowing plants to get the most out of the nutrients available to them.

    Learn More
  13. $15.00

    Gone Fish N is an all-natural, fishmeal based, high nitrogen fertilizer that is ideal for providing a nitrogen boost to plants when they need it. The benefits of Gone Fish N are noticed almost immediately and continue for several weeks after application.

    Gone Fish N can be amended into soil, watered into any type of horticultural growing medium, or added to aerated teas for additional nitrogen.

    Learn More
  14. $50.00

    Prevent Calcium & Magnesium deficiencies that cause flower drop with MassBoost Cal/Mag for huge boosts in fruit and flower development Learn More
  15. $57.76

    RAW Calcium/Mag is a fully soluble plant supplement which contains 15% calcium and 3% magnesium. RAW Calcium/Mag is a great way to supplement any feeding program. 2 lb package makes up to 3200 gallons Learn More

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Calcium and Magnesium additives are specialized nutrients designed to compensate for deficiencies in most nutrient and fertilizer schedules. Calcium and Magnesium (often referred to as Cal-Mag) is almost always needed when using pure, distilled, or reverse osmosis water. Calcium and Magnesium are the most abundant minerals in tap water however much of it is not chelated enough to be absorbed by plants. The majority of the PPM, or EC reading, you obtain from a measuring device is cal-mag.

Calcium, an essential part of the plant’s cell wall structure, improves the absorption of other nutrients by the roots and their translocation within the plant. It activates a number of plant growth-regulating enzyme systems; helps convert nitrate-nitrogen into forms needed for protein formation; and contributes to improved disease resistance.

Magnesium also helps to activate specific enzyme systems. Enzymes are complex substances that build, modify or break down compounds as part of a plant’s normal metabolism.