CalMag Mixing Guide: Strengthen Growth & Prevent DeficienciesUpdated 19 hours ago
🌱 Summary
Cronk Nutrients CalMag is a complete Calcium–Magnesium–Iron supplement designed to strengthen cell walls, prevent nutrient lockout, and boost photosynthesis.
This guide covers how to mix, apply, and balance CalMag for soil, coco, and hydro systems — ensuring strong growth, vibrant leaves, and healthy roots.
🎥 Video Guide: How to Use CalMag
🎥 Watch: Learn how to mix and apply CalMag correctly for stronger plants and higher yields.
👉 Watch on YouTube →
🔬 What Is CalMag?
CalMag combines essential secondary nutrients — Calcium (Ca), Magnesium (Mg), Iron (Fe), and Nitrogen (N) — with an NPK ratio of 2–0–0.
These elements are vital for every plant’s structure, growth, and energy production.
| Nutrient | Function |
|---|---|
| Calcium (Ca) | Strengthens cell walls and root development. |
| Magnesium (Mg) | Central element in chlorophyll; drives photosynthesis. |
| Iron (Fe) | Aids chlorophyll formation for greener foliage. |
| Nitrogen (N) | Promotes healthy leaf growth and vigor. |
💡 In short: CalMag is your plant’s daily multivitamin — preventing hidden deficiencies before they affect growth.
🌿 Why CalMag Is Essential
Without enough Calcium and Magnesium, plants struggle to:
Transport nutrients effectively.
Maintain cell structure and strength.
Produce deep green, healthy leaves.
Common signs of CalMag deficiency include:
Yellowing or curling leaves.
Brown leaf spots or weak stems.
Stalled growth or poor fruiting.
Adding CalMag ensures steady growth, strong cell structure, and optimal chlorophyll production — no matter what you’re growing.
⚗️ How CalMag Works
CalMag supports plants at every level:
Calcium builds strong cell walls and helps move nutrients through the plant.
Magnesium powers photosynthesis — turning light into plant energy.
Iron keeps leaves lush and green by supporting chlorophyll production.
Nitrogen drives rapid, healthy growth.
Together, these nutrients improve your plant’s ability to absorb and use other fertilizers efficiently.
👉 Learn how Photosynthesis uses Magnesium →
🌾 Where CalMag Fits in Your Grow Setup
CalMag works with any plant, any medium, any environment.
| Grow Type | Benefits |
|---|---|
| Soil | Prevents pH swings and boosts nutrient uptake. |
| Coco Coir | Replenishes calcium & magnesium lost from coco absorption. |
| Hydroponics | Stabilizes nutrient balance for clean, consistent growth. |
| Indoor & Outdoor | Improves leaf color, flower density, and fruit flavor. |
Perfect for vegetables, herbs, flowers, fruiting plants, and “tomato-like” species that demand high calcium and magnesium intake.
🧪 How to Mix & Apply CalMag
Recommended Dosage
| Grow Medium | Mix Rate | Frequency |
|---|---|---|
| Soil | 5 mL per gallon (1.25 mL per liter) | Every other feeding or as needed |
| Coco Coir & Hydroponics | 5 mL per gallon | Every feeding |
| Foliar Spray (optional) | 10 mL per gallon | Spray directly onto leaves; pH to 6.2 |
💡 Pro Tip: Foliar feeding gives a quick nutrient boost when deficiency symptoms appear.
⚖️ pH Targets for Maximum Absorption
| Medium | Ideal pH Range |
|---|---|
| Soil | 6.0–7.0 |
| Coco Coir | 5.5–6.5 |
| Hydroponics | 5.5–6.5 |
✅ Always check your pH after adding CalMag — it slightly raises solution alkalinity.
Keeping pH in range ensures optimal nutrient uptake and prevents lockout.
👉 Learn more about pH & Water Quality →
🌼 Best Practices & Pro Tips
🌀 Mixing Order: Add CalMag first before base nutrients or additives.
💧 Rotate Watering: Alternate between nutrient-rich and plain water based on plant response.
🧴 Storage: Mixed solutions stay stable for up to 10–14 days. Stir and recheck pH before reuse.
🌡️ Observation: Pale leaves or weak stems? Increase CalMag frequency slightly.
🧠 Compatibility: Works with Cronk’s Classic Line, Bonnie & Clyde, and PuurOrganics systems.
🌿 In Summary
Cronk Nutrients CalMag strengthens plant structure, prevents deficiencies, and improves photosynthesis efficiency.
Whether you grow in soil, coco, or hydro, CalMag ensures every plant gets the minerals it needs to reach its full potential — greener, stronger, and more productive.
“Healthy roots. Strong stems. Vibrant leaves.” 🌱
🧩 Recommended Tools & Resources
📬 Still Need Help?
Reach out to our Grow Support Team at [email protected]