Description
Prevent nutrient deficiencies and support robust plant development with Mills CalMag, a high-quality calcium and magnesium additive designed for soil, coco and hydroponic systems. Trusted by growers, Mills CalMag provides these essential secondary nutrients in a form that is readily absorbed, helping to strengthen cell walls, improve leaf health and support overall plant vitality.
Read the full product overview here...
Mills CalMag delivers a precise blend of calcium and magnesium, two critical nutrients required for strong structural growth, nutrient uptake and photosynthesis. Calcium supports cell wall formation and root development, while magnesium is a core component of chlorophyll, aiding energy production and growth efficiency.
Formulated to prevent common deficiencies, Mills CalMag is especially useful in soft water areas or when using reverse osmosis (RO) water, where calcium and magnesium levels may be naturally low. Easy to mix and integrate with your base nutrient program, it ensures consistent, reliable plant performance.
Key Features & Benefits
- Prevents Deficiencies: Supplies calcium and magnesium in a highly available form.
- Supports Vigorous Growth: Strengthens stems, roots and overall plant structure.
- Enhances Nutrient Uptake: Improves absorption of other essential nutrients.
- Versatile Application: Suitable for soil, coco coir and hydroponic systems.
- Easy to Use: Simple to add to your nutrient solution without complex preparation.
- Compatible with Base Nutrients: Complements Mills Basis A & B and other nutrient programs.
How to Use
- Shake Well: Always shake before use.
- Dosage: Add 1–3 ml per litre of water, adjusting based on plant needs and water hardness.
- Frequency: Use regularly throughout the vegetative and flowering stages, or when deficiency symptoms appear.
- Mixing: Combine with your base nutrients, ensuring even distribution and proper pH balance.
Frequently Asked Questions (FAQ)
When should I use Mills CalMag?
Use throughout the entire growth cycle, particularly in soft water areas or when using RO water. It’s also ideal when deficiency symptoms, such as leaf curl or yellowing, appear.
Can it be used with all grow mediums?
Yes, compatible with soil, coco coir and hydroponic setups.
Does it replace a base nutrient system?
No, Mills CalMag is an additive, designed to supplement your existing nutrient program.
Will it work in hard water?
Yes, effective in both soft and hard water, but particularly beneficial where calcium and magnesium are naturally low.
Calcium and magnesium are essential secondary nutrients that directly affect plant strength, leaf health and nutrient efficiency. Mills CalMag ensures your plants have a steady supply, reducing the risk of deficiencies that can stunt growth or reduce yields. By supporting structural integrity and enhancing nutrient uptake, it helps growers achieve stronger, healthier plants with better overall performance, making it an essential supplement for any serious grower.

