Green Planet Pro-Cal – Calcium and Magnesium Fertilizer for Crops
Green Planet Pro-Cal – Calcium and Magnesium Fertilizer for Crops
- Green Planet's Pro-Cal is an essential calcium, magnesium, and iron supplement, designed to maintain vigorous growth and healthy, green foliage. In addition to preventing and correcting deficiencies, it acts as an excellent buffer for substrates, especially in coco, improving cation exchange capacity (CEC) and ensuring more efficient nutrient uptake.
- - Concentrated source of Ca, Mg, and Fe.
- - Improves cell structure and activates vital enzymes.
- - Stimulates chlorophyll production and maintains intense green foliage.
- - Replaces toxic salts (excess Na, K) with essential nutrients.
- - Functions as a cleaning and balancing solution for coco substrates.
- - Prevents common deficiencies in demanding crops.
- - Compatible with any nutrient program.
- - Suitable for use in soil, coco, and hydroponics.
Discover the benefits of the PRO CLUB
Discounts of up to -12%, priority shipping and more.
Easy returns within 15 days
No questions asked
Description
- 🧪 Complete calcium, magnesium, iron, nitrogen, boron and zinc contribution, essential for all phases of the crop.
- 🌱 Reinforces the cellular structure and improves the absorption of nutrients.
- 🌿 It favors photosynthesis Thanks to the magnesium, core of chlorophyll.
- 💧 High solubility, ideal for correcting deficiencies quickly and safely.
- ⚙️ Compatible with all cultivation systems and easy to apply with each irrigation.
Full description
Green Planet Pro-Cal
Pro-Cal is a complete nutritional supplement that provides calcium, magnesium, iron, nitrogen, boron and zinc, essential nutrients for optimal development in all stages of the crop.
This additive is key during times of maximum growth and flowering, when plants need to strengthen their cellular structures, produce chlorophyll and carry out photosynthesis efficiently. Calcium strengthens cell walls and improves the absorption of other nutrients. Magnesium It is the nucleus of the chlorophyll molecule, essential for the green color and energy efficiency of your plants.
Thanks to its high solubility, Pro-Cal It ensures rapid absorption without blockages, correcting common deficiencies and enhancing the health of roots and leaves. Ideal for maintaining vigorous development and preventing critical deficiencies that affect production.
How to use
Add 1.25 ml per liter of water in each irrigation, following the usual fertilization schedule, especially in stages of high nutritional demand.
Recommended for:
-
Growth and pre-flowering phase
-
Crops in coconut, soil or hydroponics
-
Avoid calcium and magnesium deficiencies
-
Improve photosynthesis, structure and final performance
Pro-Cal guarantees a balanced crop, healthy plants and more abundant harvests.
Warranty
At GrowIndustry we only work with proven quality products and trusted brands.
Every item goes through a check before shipping to make sure it arrives in perfect condition and ready to use.
Your satisfaction is our priority.
How to use
Pro-Cal is easily integrated into a fertilization program, especially useful when using reverse osmosis water, rainwater, or coco substrate.
- Standard dose: 1.25 ml per liter of water.
- Use with every fertilizer application, from growth to 1 week before harvest.
- For coco: re-buffer the substrate with Pro-Cal at 2 ml/L in combination with 1/3 strength nutrient solution.
- Always add before base nutrients in the mixture.
- Compatible with any program and growing medium.
- Check the pH and EC of the solution after addition.
- Shake well before use.

Green Planet Pro-Cal – Calcium and Magnesium Fertilizer for Crops
Join our exclusive club for regular customers and start enjoying unbeatable prices, VIP service and premium support for your grows.
Increasing discounts
Save an extra -3% to -12%
Envío gratis antes
Desde 39 € en Bronze y sin mínimo en Platinum (hasta 10 kg)
Fast deliveries
With free, discreet shipping
Extended warranty
Up to 3 years
Frequently asked questions
-
It is a complete nutritional supplement that supplies calcium, magnesium, iron, nitrogen, boron and zinc, essential nutrients for optimal development at every stage of the grow. It is key during periods of maximum growth and flowering, when the plant needs to reinforce its cell structures and produce chlorophyll.
-
Calcium strengthens the cell walls and improves the uptake of other nutrients. Magnesium is the core of the chlorophyll molecule, essential for the green colour and the energy efficiency of your plants.
-
Add 1.25 ml per litre of water at every watering, following your usual fertilising schedule. It is especially recommended during stages of high nutritional demand, such as growth and pre-flowering.
-
Yes, thanks to its high solubility it ensures fast uptake with no lock-out, correcting common calcium and magnesium deficiencies. That way you avoid critical shortfalls that could affect your final yield.
-
Pro-Cal is recommended for grows in coco, soil or hydroponics. In all of them it boosts root and leaf health, improves photosynthesis and contributes to a higher final yield.
-
You can pay securely by card, Bizum or PayPal, and you can also split the payment with Klarna or ViaBill. On top of that, shipping takes 24/72h and you have easy returns within 15 days.