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Green House Powder Feeding Calcium 500 gr
Green House Powder Feeding Calcium 500 gr is an EDTA-chelated calcium additive in powder form, engineered as the essential companion to the calcium-free Powder Feeding base fertilizers. When growing with RO water, rainwater, or soft tap water, the calcium that hard water naturally provides is absent from your nutrient solution. This additive fills that gap with a highly stable chelated calcium form that does not interact with other nutrients in solution. Calcium strengthens cell walls, supports structural integrity, and prevents characteristic deficiency symptoms. Available at plantandflower.be with fast Belgian delivery.
Green House Powder Feeding Calcium 500 gr – EDTA-Chelated Calcium for Structural Integrity
The Green House Powder Feeding mineral system is built on modular design: base fertilizers deliberately exclude calcium, allowing growers to calibrate calcium input based on their specific water chemistry. Hybrids, Short Flowering, and Long Flowering all operate calcium-free because most municipal water supplies contain sufficient calcium. The Calcium 500 gr additive activates when the water source does not provide this structural nutrient – a standard scenario for RO water, rainwater, and soft tap water users.
EDTA Chelation: Technical Advantages Over Calcium Nitrate
Calcium nitrate (Ca(NO₃)₂) is the most common calcium source in horticulture, but it carries inherent limitations. In concentrated stock solutions, calcium nitrate is partially incompatible with monopotassium phosphate and magnesium sulfate, forming insoluble gypsum and calcium phosphate precipitates that block irrigation lines and remove nutrients from solution. Green House Calcium uses EDTA chelation to eliminate these issues entirely:
- Zero precipitation risk: the EDTA ligand holds calcium in ionic form, preventing reaction with phosphates and sulfates even at elevated concentrations.
- NPK-neutral: unlike calcium nitrate which adds nitrogen, EDTA-chelated calcium does not alter the NPK balance of your feeding program.
- Broad pH availability: chelated calcium remains plant-available across pH 4.0-8.0, where free calcium ions would precipitate as calcium phosphate at higher pH.
- High solubility: maximum 300 g/L with recommended stock solution concentration of 90 g/L for dosing systems.
Calcium Physiology: Why Continuous Supply is Non-Negotiable
Calcium is unique among plant macronutrients in two critical ways. First, it is a structural component of cell walls – calcium pectinate in the middle lamella literally cements cells together, providing mechanical strength to stems, leaves, and flowers. Second, calcium is phloem-immobile: the plant cannot redistribute calcium from mature tissue to growing points. Every new cell requires fresh calcium delivered via the xylem stream. Any interruption in calcium supply causes immediate damage to the youngest tissues – growing tips, new leaves, and meristems – manifesting as marginal necrosis, leaf deformation, and structural softening. By the time visible symptoms appear, irreversible damage has already occurred, making preventive supplementation the only reliable strategy.
Application Protocol
Dissolve calcium in a separate container before adding to your diluted nutrient solution. Never mix concentrated calcium directly with Powder Feeding solution. Combine with Hybrids 500 gr, Short Flowering 500 gr, or Long Flowering 500 gr as the calcium complement to the calcium-free base program. Do not use this product simultaneously with Green House CalMag – select one based on whether calcium alone or calcium plus magnesium is needed.
Order Green House Calcium 500 gr from plantandflower.be – Belgium's specialist growshop with fast delivery. The precision calcium solution for soft water growers.
Do I need Green House Calcium when using hard tap water?
Hard tap water above 150 ppm calcium typically provides sufficient calcium without supplementation. The Powder Feeding base fertilizers are deliberately calcium-free because hard water delivers this nutrient naturally. The Calcium additive becomes essential only with RO water, rainwater, or soft tap water below 150 ppm calcium.
Why must calcium be dissolved separately?
Concentrated calcium can react with phosphates and sulfates in the base fertilizer, forming insoluble calcium phosphate or gypsum precipitates. Dissolving calcium separately in water first, then adding it to the diluted nutrient solution, prevents all precipitation and maintains full nutrient availability.
What is the difference between Green House Calcium and CalMag?
Calcium is a pure EDTA-chelated calcium additive with no magnesium or additional nitrogen. CalMag provides calcium, magnesium, and nitrogen together. Green House recommends using one or the other, not both. Choose Calcium when only calcium supplementation is needed; choose CalMag when both calcium and magnesium are deficient.
Does EDTA-chelated calcium affect the NPK ratio of my nutrient solution?
Unlike calcium nitrate which adds nitrogen to your solution, EDTA-chelated calcium contributes zero NPK macronutrients. Your base fertilizer's carefully calibrated NPK balance remains completely unaffected, with only calcium added as a targeted supplement.
