Mills CalMag.

A highly concentrated calcium and magnesium top-up that turns soft, empty water into something your plants can actually work with.

Mills CalMag is a concentrated calcium (Ca) and magnesium (Mg) supplement from Dutch brand Mills Nutrients, with an NPK value of 8-0-0. Dosed at roughly 1ml per litre, it raises the EC of soft or reverse osmosis (RO) water, prevents Ca/Mg deficiencies at every stage of growth, and is available in 1L and 5L bottles for soil, coco and hydro.

• Concentrated Calcium & Magnesium
• Essential for Soft & RO Water
• Ideal for Coco Coir
• Prevents Common Deficiencies
• Stabilises Starting EC
• Stronger Cell Walls
• Supports Healthy Photosynthesis
• 100% PGR Free
• Lasts Ages - Around 1ml Per Litre

Great Plants Start With Water.

Here’s something nobody tells you when you start growing.

You can buy the finest nutrients on the planet, and if your water is soft as a lamb, your plants will still go hungry.

Soft tap water and RO water are wonderfully clean. They’re also practically empty of the two elements plants miss most: calcium and magnesium.

Mills CalMag puts them back. A small splash, a quick stir, and your feed suddenly has proper foundations.

Calcium Builds. Magnesium Powers.

Think of calcium as the scaffolding. It strengthens every cell wall, giving you sturdier stems and plants that shrug off stress.

Magnesium is the engine. It sits at the very heart of chlorophyll, the green stuff that turns light into growth.

Run short of either and your plants will soon tell you, with yellowing between the veins, rusty spots and weak new growth.

Run Mills CalMag and they simply won’t.

Made For Coco. Brilliant Under LEDs.

Coco coir is a superb growing medium with one slightly annoying habit. It hangs on to calcium and magnesium like a toddler with a biscuit.

Add powerful LED lighting and hungry fruiting crops like tomatoes and chillies, and demand goes through the roof.

CalMag keeps supply one step ahead. It also rides to the rescue late in the season, when heavy PK boosting can crowd calcium and magnesium out.

A Bottle That Lasts And Lasts.

Mills have pushed the concentration right up, so around 1ml per litre is all it takes to lift your EC.

Already running Mills Basis A+B Soft Water? You may not need it at all, as that version is already enriched with calcium and magnesium.

Small dose.

Big difference.

Exactly how a supplement should be.

Mills CalMag Technical Specification

Product includes:

• 1 x Mills CalMag bottle (your chosen size)