Nurture System
No.4 CalMag – 250ml
No.4 CalMag – 250ml
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Calcium & Magnesium Supplement for Strong, Healthy Growth
Nurture System CalMag is a specialist nutrient additive designed to support houseplants that require more than a standard fertiliser can provide. Calcium and Magnesium are essential secondary macronutrients that play a key role in overall plant structure, growth, and nutrient movement.
In houseplants, deficiencies in these nutrients can often show as pale, weak, or stressed-looking foliage, as well as slowed or uneven growth. CalMag helps correct these imbalances, restoring stronger, healthier leaf development and improving overall plant vitality.
Calcium is essential for building strong cell walls, which improves structure and resilience, while Magnesium is a key component in chlorophyll production - meaning healthier, deeper green foliage and improved photosynthesis.
By supporting these functions, CalMag helps improve nutrient uptake, reduce stress, and promote more consistent growth.
Why houseplants like CalMag:
- Supports strong cell structure and growth (Calcium)
- Promotes rich green foliage and healthy photosynthesis (Magnesium)
- Helps correct nutrient deficiencies in active or fast-growing plants
- Improves nutrient uptake and movement throughout the plant
- Reduces signs of stress and weak growth
Key Features:
- Targets nutrient deficiencies – ideal when standard feeding isn’t enough, and the plant is pushing out deformed leaves
- Improves leaf colour and health – restores lush, vibrant growth
- Boosts structural strength – helps plants grow stronger and more resilient
- Reduces stress impact – supports plants under heavy growth or environmental change
- Can be used as foliar feed – for fast nutrient absorption through leaves
Not sure which blend to choose?
Then check out our Houseplant Index! We've done all the hard work for you, simply search your plant's name and the guide will tell you it's preferred mix.
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100% Peat Free
All of our mixes are fully peat free, 100% freshly made to order and packed with beneficial microfauna. The natural stuff your plants love and need for healthy growth and nutrition.
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Trusted By Enthusiasts Everywhere
Our products are trusted by houseplant enthusiasts of all experience levels and it's because of that, our soil is used internationally. Still unsure? Check out our reviews on Google!