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Plant Magic Magne-Cal + is the premium calcium and magnesium additive, essential for robust plant health and combating common nutrient deficiencies in hydroponics, coco, and soil. This superior formula contains vital trace elements to boost photosynthesis, strengthen cell structure, and maximise PK booster performance for higher yields.
Give your plants the essential building blocks they need to thrive with Magne-Cal + from Plant Magic. This superior formulation is much more than a standard Cal-Mag supplement; it is a vital, comprehensive additive engineered for all stages of growth. Whether you are battling a magnesium deficiency, using soft water or Reverse Osmosis (RO) water, or seeking to maximise the performance of your flowering supplements, Magne-Cal + provides the necessary secondary nutrients and trace elements to ensure robust health, stronger cell development, and highly efficient nutrient uptake across all growing media, including soil, coco coir, and hydroponic systems.
Key Benefits of Plant Magic Magne-Cal +
- Prevents and Cures Deficiencies: Rapidly resolves common calcium and magnesium deficiencies, stopping yellowing (chlorosis) between the veins of older leaves, particularly when used as a fast-acting foliar feed.
- Boosts PK Performance: Contains a balanced ratio of Magnesium (Mg) and Calcium (Ca) that works synergistically to increase the absorption and effectiveness of PK boosters, such as Plant Magic Platinum PK 9/18.
- Enhanced Nutrient Uptake: The 'Plus' in the name signifies the inclusion of a full complement of vital trace elements, including Nitrogen (N), Iron (Fe), Zinc (Zn), and Molybdenum (Mo), promoting stronger metabolic processes.
- Strengthens Plant Structure: Calcium is crucial for cell wall development, leading to greater strength, rigidity, and resistance to environmental stress.
- Maximises Photosynthesis: High-quality Magnesium is essential for chlorophyll production, leading to increased rates of photosynthesis, greener foliage, and higher overall yields.
- Works With All Systems: Perfectly compatible with any hydroponic setup, coco coir, or soil system, providing targeted nutrition where base feeds may fall short, especially when paired with products like Plant Magic Hydro A&B or Plant Magic Old Timer Organic Grow.
How to Use Plant Magic Magne-Cal +
Magne-Cal + can be used proactively as a regular supplement or reactively to correct existing deficiencies. Always shake well before use.
General Application/Dosage Rates:
- Standard Maintenance Dose (Vegetative & Bloom Cycle): Apply at a rate of 0.5–1ml per litre of water. Use this as part of your normal feeding schedule, from the start of the growth stage until the final flushing stage.
- Foliar Spray (For Rapid Deficiency Correction): Use a reduced rate of 0.25–0.5ml per litre of water (a ½ dose). Spray directly onto the leaves during the 'lights off' period to allow for fast, localised nutrient absorption.
Important Notes:
- Soft/RO Water: Use Magne-Cal + to introduce essential background mineral hardness when using soft water or purified RO water, preventing common deficiencies from the start.
- PK Boosters: For best results, use throughout the entire flowering cycle alongside heavy PK boosters to prevent nutrient lockout and maximise flower development.
- pH: The optimal pH range for your nutrient solution when using Magne-Cal + is typically 5.5–6.2.
- For complete nutrient guidance and recommended usage alongside other products like Plant Magic Root Stimulant, consult the official Plant Magic Feed Charts (available from the Downloads tab above).
CalMag supplements can be vital for coco growers, have a read of our blog post Soil vs Coco: What's the difference? to see why.
Available in 500ml, 1 litre and 5 litres.
Frequently Asked Questions
When should I start using Plant Magic Magne-Cal + in my feeding schedule?
You can integrate Magne-Cal + throughout your entire growth cycle, from early vegetative growth right through to the final weeks of bloom before flushing. It is often recommended to use it continuously, especially if you are using soft water/RO water or when you introduce powerful bloom boosters, as it acts as an essential insurance policy against common nutrient imbalances.I think I have a magnesium deficiency; how exactly should I apply Magne-Cal+?
For a suspected magnesium deficiency (yellowing between the veins of older leaves), you have two options for correction:- Systemic: Increase the dose in your nutrient tank to 1ml/L.
- Rapid Correction: Use as a foliar spray at a half dose (0.25–0.5ml/L) on the affected leaves during the dark period. This provides faster localised uptake.
Why choose Magne-Cal + over a standard Cal-Mag product?
Magne-Cal + is a next-generation supplement that contains the two essential minerals (Ca and Mg) plus a complete suite of trace elements (including Iron, Zinc, and Nitrogen) that are often missing or insufficient in traditional Cal-Mag formulas. This additional micronutrient profile ensures better overall plant health, root development, and significantly increased efficiency of your primary nutrients and additives.Does Magne-Cal + work with all nutrient ranges, or only Plant Magic nutrients?
Plant Magic Magne-Cal + is a universal supplement designed to be fully compatible with any brand of base nutrient or additive on the market. It is formulated to address specific mineral requirements and will successfully balance the mineral profile of your water and nutrient solution, regardless of your chosen brand.SKU: 1525Free delivery on orders over £60*
- UK Mainland onlyStandard Delivery £4.95
- Heavy / Large item surcharge £2 per item
- 1-3 Days**
- UK Mainland onlyExpress Delivery £8.95*
- Next Working Day**
- UK Mainland onlyScottish Highlands £15.95*
- 2-5 Days***Can not be used with Heavy / Large items
**If ordered on a working day before 2pm cut off (Saturday and Sunday are not classed as working days).Please See Delivery and Returns page for more details.