Description

Prevent common nutrient deficiencies and keep plants thriving with Plant Magic Magne-Cal, a high-quality calcium and magnesium supplement designed to support healthy growth, strong cell structure and improved nutrient uptake. Ideal for use in soft water areas, coco coir and LED-lit grow rooms, Magne-Cal helps maintain optimal plant health throughout the grow cycle.

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Plant Magic Magne-Cal is a carefully balanced calcium and magnesium additive formulated to prevent and correct Ca/Mg deficiencies that can limit growth and reduce yields. Calcium is essential for strong cell walls and healthy root development, while magnesium plays a vital role in chlorophyll production and photosynthesis.

This supplement is especially beneficial when using Reverse Osmosis (RO) or soft water, coco substrates, or high-intensity LED lighting, all of which can increase calcium and magnesium demand. Magne-Cal is suitable for use during both vegetative growth and flowering and works seamlessly alongside your base nutrient programme.

Compatible with soil, coco and hydroponic systems, Plant Magic Magne-Cal is an essential additive for maintaining balanced nutrition and preventing growth problems before they occur.

Key Features & Benefits

  • Prevents Calcium & Magnesium Deficiencies: Supports healthy growth and nutrient balance.
  • Strengthens Plant Structure: Calcium helps build strong cell walls and roots.
  • Improves Photosynthesis: Magnesium supports chlorophyll production.
  • Ideal for Soft & RO Water: Corrects low Ca/Mg levels in purified water.
  • Perfect for Coco Grows: Helps maintain proper Ca/Mg balance in coco substrates.
  • LED Grow Friendly: Supports increased nutrient demand under LED lighting.
  • Use Throughout the Grow Cycle: Suitable for veg and flowering stages.
  • Easy-to-Use Liquid Formula: Mixes easily with nutrient solutions.

How to Use

  • Shake well before use.
  • Mix 0.5 to 1 ml per litre of water.
  • Use with every watering or as required to correct deficiencies.
  • Suitable for use during vegetative growth and flowering.
  • Adjust pH after mixing all nutrients.
  • Tip: Increase dosage slightly when using RO water, coco coir or under high-intensity LED lighting.

Frequently Asked Questions (FAQ)

What does Plant Magic Magne-Cal do?
It supplies essential calcium and magnesium to prevent deficiencies and support healthy plant growth.

When should I use Magne-Cal?
It can be used throughout the entire grow cycle, especially when using soft or RO water.

Is Magne-Cal suitable for coco grows?
Yes, it’s highly recommended for coco, which can bind calcium and magnesium.

Can I use Magne-Cal with all nutrient brands?
Yes, it’s compatible with most nutrient programmes.

Will Magne-Cal help with LED grow issues?
Yes, LED lighting often increases Ca/Mg demand, making Magne-Cal ideal for LED setups.

Calcium and magnesium deficiencies are among the most common issues growers face, particularly when using coco, RO water or LED lighting. Plant Magic Magne-Cal provides a simple, effective solution by restoring essential minerals that support strong growth, efficient photosynthesis and overall plant health. Easy to use and highly versatile, Magne-Cal helps prevent problems before they impact yield, making it an essential supplement for consistent, high-quality results.

Explore the range

See all Additives & Boosters (153)

Not sure which one is right for your setup? Message us on WhatsApp or call 0121 553 7872.

Delivery, returns and FAQs

Will my order arrive in plain packaging?

Yes. Every order is sent in plain, unbranded packaging as standard.

How quickly will my order arrive?

Order standard size items by 12pm on a working day and choose Next working day at checkout, and your order will be with you the next working day. Standard delivery takes 2 to 3 working days.

Bulky items such as grow tents, large fans and 50L bags of soil go by courier in 2 to 3 working days, or on a pallet for very heavy orders. Next day is not available for these, and if your basket includes a bulky item the whole order travels with it.

UK delivery is free on orders of £94.99 or more, except for bulky items. See our delivery page for full prices.

Can I collect from the shop?

Yes. Choose Click & Collect at checkout and pick up for free from our shop at Unit 2 Black Lake, West Bromwich, B70 0PJ. Orders are usually ready within 1 hour.

Can I return an item?

You have 14 days from receiving your order to tell us you want to cancel, then a further 14 days to send it back. Items need to be unopened and in a resaleable condition.

If you change your mind, the return postage is paid by you. If something arrives faulty or damaged, send us photos within 48 hours and we will cover the cost of putting it right. Full details are in our refund policy.

Do you price match?

Yes. If you find the Plant magic MagneCal+ 5L cheaper at another UK retailer, use the Price Match button on this page. We usually reply within one business day.

Need help choosing?

Speak to our team. Call us on 0121 553 7872, message us on WhatsApp, or visit the shop in West Bromwich.

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