Mills Organics CAL
Updated 18 Oct 2026
OMRI Listed
Mills Organics CAL is an organic liquid calcium supplement that maintains plant health at cellular level, supports cell wall structure and activates the enzymes that trigger growth. Used in growth and bloom alongside the Mills Organics line.
Usage & Instructions
Use 0.5-1.5 ml per litre depending on the growth and bloom stage. Follow the Mills Organics growth chart.
Product Specifications
Description
Mills Organics CAL provides extra calcium for cell wall structure and plant health at cellular level, activating enzymes needed to trigger growth. The brand claims larger, fuller flowers and faster growth through a stimulating effect on metabolism. OMRI and Vegan Society logos shown on the Mills product page.
Available variants
Nutrients Organic
All products in the Nutrients Organic range.
Mills Organics Base
Mills Organics Base is a complete liquid blend of organic micro- and macronutrients for every stage of the plant life cycle. Its high organic matter content improves soil structure, and chelation boosts nutrient absorption and uptake.
Mills Organics Bloom
Mills Organics Bloom is an organic liquid fertiliser for the flowering phase with an organic potassium source. It promotes bigger, heavier flowers and better yields and stimulates soil life for tastier fruits. Used from bloom week 1.
Mills Organics Grow
Mills Organics Grow is an organic, nitrogen-rich liquid fertiliser made from vegetable raw materials for the early growth phase. It provides building blocks for enzyme and protein production and supports a strong root system and accelerated growth.
More from Mills
Other products by Mills.
Mills Basis A
Mills Basis A is part A of the two-part Mills Basis A & B mineral base nutrient. Used together in equal amounts, A and B supply all macro- and micronutrients in balanced proportions for both the vegetative and flowering phases. NPK 3-0-1.
Mills Basis B
Mills Basis B is part B of the two-part Mills Basis A & B mineral base nutrient. Used together in equal amounts, A and B supply all macro- and micronutrients in balanced proportions for both the vegetative and flowering phases. NPK 0-4-3.
Mills C4
Mills C4 is a liquid bloom stimulator that encourages early flower sets and assists carbohydrate delivery and the production of essential oils. It is a concentrated mix of sugars, vitamins, amino acids and humic acids. NPK 0.7-3-3.
Mills CalMag
Mills CalMag is a highly concentrated liquid calcium and magnesium supplement. It corrects and prevents Ca and Mg deficiencies, supports growth and vitality and stabilises EC, and is essential with soft water or reverse-osmosis water.
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