Evoponic - Magi-Cal Extra

Evoponic Magi-Cal Extra — High-Strength Calcium Magnesium Supplement for Indoor Growing

Best for: Growers using RO water, coco coir, or fast-growing plants that need reliable secondary nutrient support

Evoponic Magi-Cal Extra is a high-strength calcium and magnesium supplement designed to correct secondary nutrient deficiencies and enhance overall plant performance throughout the growing cycle. It's not just a simple mineral top-up — the formula includes plant-sourced amino acids, humates, lignins, and sugars that work as biostimulants, improving nutrient uptake, plant vigour, and final yield. Safe for organic-certified growing, easy to dose, and formulated so you can't overdose your plants.

How it compares

Magi-Cal Extra sits in the mid-to-premium tier of calcium-magnesium supplements, differentiated by its botanical additives.

• Basic Cal-Mag formulas deliver minerals only; Magi-Cal Extra includes plant-derived biostimulants for enhanced results
• Stronger concentration than many entry-level options — 7.4% magnesium and 6% calcium means less liquid needed per litre
• Formulated with anti-stress properties, not just deficiency correction
• Organic-certification compatible, unlike some nutrient lines with synthetic PGRs
• Works alongside any base nutrient range, regardless of brand

Usage guidance

Magi-Cal Extra works across different growing setups and substrate types:

General application
Dose at 0.5ml to 1ml per litre of water, regardless of substrate. Start at 0.5ml/L and increase if you're seeing deficiency symptoms (yellowing between leaf veins, browning leaf edges, stunted growth). You can't overdose it, so adjust with confidence.

RO water and hydroponics
This is where Magi-Cal Extra earns its place. Reverse osmosis water strips out minerals completely, and fast-growing hydroponic plants burn through calcium and magnesium quickly. Run it from seedling stage through to finish.

Coco coir systems
Coco naturally binds calcium and magnesium, making them less available to roots. Use Magi-Cal Extra from week one in any coco-based setup. The biostimulant components also help coco-grown plants utilise nutrients more efficiently.

Soil and peat-based growing
Add during rapid vegetative growth or bloom periods when plants outpace the medium's mineral availability. Useful for correcting tip burn, blossom end rot, and general yellowing.

Timing
Add to your base nutrients at each feed. The plant extracts enhance uptake of your primary NPK, so you'll see better overall growth, not just deficiency correction.

Technical specifications

• Format: 1 litre bottle
• Magnesium content: 7.4% (MgO equivalent)
• Calcium content: 6% (CaO equivalent)
• Nitrogen (nitrate form): 5%
• Plant-derived amino acids: 2%
• Additional components: Humates, lignins, sugars, trace elements
• Application rate: 0.5ml–1ml per litre of water
• Suitable for: Hydroponics, coco coir, soil, peat-based substrates
• Certification: Organic-compatible formulation (no synthetic PGRs)
• Overdose risk: Minimal — formula is designed to prevent nutrient burn

Who this is for

• Hydroponic and deep water culture growers running nutrient-hungry systems
• Anyone using reverse osmosis or distilled water that lacks mineral content
• Coco coir growers who need reliable calcium and magnesium availability
• Growers experiencing yellowing, tip burn, or blossom end rot despite feeding correctly
• Those wanting improved yield and plant vigour without switching base nutrients
• Organic-certified or organic-aspiring growers needing approved nutrient support
• Fast-growing plants or those in the bloom phase demanding consistent mineral supply

Our take

Magi-Cal Extra is a solid, science-backed supplement that does more than just patch deficiencies. The biostimulant additions actually improve plant health and final results, which you'll notice in vigour, yield, and consistency. It's the kind of product that pays for itself once you've used it properly.

If you're running coco, hydroponics, or using RO water, this is worth picking up while clearance stock lasts. Does exactly what it should, day in, day out.