Description
Sensi CalMag Xtra 1 Litre is Advanced Nutrients’ dedicated calcium, magnesium, and iron supplement, formulated with the precision ingredient selection and chelation science that the Advanced Nutrients brand applies to every product in their range. Sensi CalMag Xtra provides a highly bioavailable blend of calcium, magnesium, and chelated iron, along with additional micro-elements that support the comprehensive trace element status that high-performance indoor crops require under intense artificial lighting.
Advanced Nutrients’ Approach to CalMag Supplementation
Advanced Nutrients has invested significantly in understanding the precise calcium and magnesium requirements of intensively grown crops. Their research confirms what many experienced growers know from practice: standard base nutrients frequently undersupply calcium and magnesium relative to the actual demand of plants grown under high-intensity lighting on a tight nutrient programme. Sensi CalMag Xtra is the response to this gap — a supplement calibrated to fill the difference between what base nutrients provide and what demanding crops actually need. The chelation science applied to the iron in Sensi CalMag Xtra is particularly important. Iron is among the most problematic micronutrients to maintain in bioavailable form in hydroponic solutions. Unchelated iron precipitates rapidly with phosphates, becoming unavailable to plants. The chelated form in Sensi CalMag Xtra remains stable and bioavailable across a wide pH range, ensuring plants receive the iron they need regardless of minor pH fluctuations in the nutrient solution. At The Horticulture Company, Advanced Nutrients products are among the most popular premium nutrient brands we stock. Sensi CalMag Xtra is a consistent seller to growers running the Advanced Nutrients base programme and to those supplementing other nutrient brands with a premium CalMag product.
Dosage and Application
Use Sensi CalMag Xtra at 1–2ml per litre of nutrient solution throughout the vegetative and early flowering stages. Add to water first before introducing base nutrients or pH adjusters. Compatible with all growing media and all major base nutrient brands. Particularly recommended for coco coir growing, soft water areas, and RO water users.







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