Shogun CalMag — RO/Coco-Specific Calcium & Magnesium

Shogun CalMag — Calcium & Magnesium Supplement for RO Water & Coco Coir

Shogun CalMag adds base nutrients into RO water for easier pH control and to avoid nutrient deficiencies — particularly important in coco coir growing where the medium binds calcium and magnesium naturally. CalMag improvements include better nutrient uptake, better translocation of nutrients around the plant, and increased growth rates during vegetative stage.

Why growers choose Shogun CalMag:

• Adds base nutrients to RO water — easier pH control vs neat RO water
• Prevents Ca/Mg deficiencies in coco — coco binds these naturally, requiring supplementation
• Improves nutrient uptake — Ca and Mg are critical to overall absorption efficiency
• Better translocation through the plant — Ca particularly is key to nutrient transport
• Increases vegetative growth rates — Ca/Mg are structural; deficiency stops growth
• Pairs with Shogun feeding programme — Samurai Hydro/Coco/Terra base nutrients
• Compatible with any base nutrient — universal CalMag, not Shogun-only

Who it's not for:

Check your tap water EC before ordering. UK tap water is often already hard (EC 0.6-0.8+) — if yours is, you don't need CalMag and over-supply causes other problems. Most useful for RO users, soft-water rural areas, or coco growing specifically. For similar products: Canna CalMag, Athena CaMg, VitaLink CalMag, Dutch Pro CalMag are all alternatives. Not a base nutrient — supplement to your full feeding programme.

In stock now — ships same working day from our Staffordshire warehouse with free UK delivery over £100. Pick up in-store at our Stone shop (ST15 0SR) if you're local, or click & collect at checkout.