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Canna Calmag Agent 1L , calcium and magnesium in a transparent container.
  • Canna Calmag Agent 1L , calcium and magnesium in a transparent container.
Canna Calmag Agent 1L , calcium and magnesium in a transparent container.

Canna CalMag Agent – Premium Calcium-Magnesium Supplement for Stronger Plants & Bigger Buds

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Don't let calcium or magnesium deficiencies stunt your grow. Canna CalMag Agent is the professional-grade supplement designed to fortify your plants, prevent common nutrient lockouts, and promote robust, healthy growth for maximum yields. Perfect for use with reverse osmosis water or in soft water areas, it's the key to unlocking your garden's full potential.
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Canna CalMag Agent is your essential insurance policy against two of the most common and frustrating nutrient deficiencies in cannabis cultivation: calcium and magnesium. This premium supplement is scientifically formulated to harden soft water, stabilize your nutrient solution's pH, and deliver the perfect balance of Ca and Mg your plants crave for explosive vegetative growth and dense, resinous flowers.

Are you tired of seeing those telltale rusty spots on your leaves or watching new growth come in twisted and weak? These are the classic cries for help from a plant lacking calcium and magnesium. It's a problem that can sneak up on any grower, especially if you're using purified reverse osmosis water or live in an area with naturally soft tap water. Without these crucial secondary nutrients, your plants can't properly uptake other vital elements, leading to stunted growth, poor yields, and a harvest that never reaches its true potential.

This deficiency doesn't just slow things down; it actively sabotages your hard work. You feed them, you love them, but they still show signs of hunger. The frustration is real. Your plants are struggling to build strong cell walls, produce chlorophyll, and create the energy needed for those massive, sticky buds you're dreaming of. It's like trying to build a skyscraper without enough steel reinforcement – the structure will be weak and prone to failure.

That's where Canna CalMag Agent comes in as the simple, effective solution. Think of it as the foundational multivitamin for your garden. By adding this agent to your nutrient regimen, you're directly addressing the root cause of the problem. It seamlessly integrates into your feeding schedule, whether you're growing in cannabis soil, running a hydroponic system, or using the popular Canna Coco substrate it was perfected for. You stop the deficiencies before they start, giving your plants the consistent, balanced nutrition they need to thrive from seedling to harvest.

Transform Your Grow from Struggling to Thriving

Integrating Canna CalMag Agent into your routine is like flipping a switch for plant health. You'll notice the difference quickly. New growth emerges strong and vibrant, free from the distortions and discolorations of deficiency. Leaves become a deeper, richer green as chlorophyll production kicks into high gear. Most importantly, your plants develop the robust cellular structure needed to support heavy, dense colas without snapping branches. It's the behind-the-scenes workhorse that ensures every other nutrient you provide – from your base cannabis fertilizers to your bloom boosters – can be absorbed and utilized efficiently, leading to a smoother, more predictable, and ultimately more successful grow cycle.

How to Use Canna CalMag Agent for Maximum Results

Using Canna CalMag Agent is straightforward, but doing it right makes all the difference. Follow these steps to integrate it seamlessly into your grow:

  1. Test Your Water First: Always start by checking the hardness (EC/PPM) of your source water. This is especially crucial if you use reverse osmosis (RO) water or have naturally soft tap water.
  2. Prepare Your Solution: Fill your reservoir or mixing container with water. Add the recommended dose of Canna CalMag Agent *before* adding your base A and B nutrients. This order is key for stability.
  3. Dosage is Key: The general guideline is 1-2 ml per liter of water. Always refer to the official Canna feeding chart for precise dosing based on your growth stage and system.
  4. Mix Thoroughly: Stir or circulate the solution well to ensure the CalMag is fully dissolved and integrated.
  5. Add Base Nutrients: Now, add your Canna Coco A & B or other base fertilizers according to their schedule.
  6. Check and Adjust pH: One of CalMag Agent's benefits is pH stabilization, but you should still always check and adjust your final nutrient solution pH to the ideal range for your medium (typically 5.8-6.2 for coco/hydro).
  7. Avoid Common Mistakes: Never mix CalMag Agent directly with concentrated base nutrients. Don't overdose, as this can cause its own nutrient lockouts. Use it consistently throughout the grow, especially during rapid growth phases.

Key Advantages and Benefits of Canna CalMag Agent

  • Prevents Critical Deficiencies: Its balanced formula directly supplies bioavailable calcium and magnesium, stopping deficiency symptoms like rust spots, yellowing between veins, and weak new growth before they can damage your yield.
  • Hardens Soft Water: Specifically designed for growers using RO or soft water, it increases water hardness to an optimal level, creating a stable foundation for your entire nutrient regimen.
  • Stabilizes Solution pH: It helps buffer your nutrient solution, preventing wild pH swings in the reservoir over time, which leads to less stress and more consistent nutrient uptake for your plants.
  • Optimized for Coco Coir: While great for all mediums, it's perfected for use with Canna Coco, a substrate that can naturally bind calcium and magnesium, ensuring your plants get what they need.
  • Promotes Stronger Plant Structure: Calcium is essential for building strong cell walls, leading to sturdier stems and branches that can support the weight of heavy, dense flowers without needing excessive plant supports.
  • Enhances Flower Quality: By preventing deficiencies, your plants can focus their energy on producing larger, more resinous buds with potentially improved terpene profiles, rather than fighting for survival.
  • Maintains Reservoir Quality: The formula helps keep other nutrients in solution, preventing precipitation and ensuring every milliliter of your mix is effective and usable by the roots.

Care and Maintenance Tips

Store your Canna CalMag Agent in a cool, dark place away from direct sunlight. Always shake the bottle well before use to ensure the contents are properly mixed. Keep the lid tightly sealed to prevent contamination or evaporation. When mixing, always add CalMag to your water first, before any other nutrients, to avoid potential interactions that could cause cloudiness or precipitation in your reservoir. For best results, use it consistently as part of your weekly feeding schedule rather than as a sporadic corrective measure.

Frequently Asked Questions

Can I use Canna CalMag Agent with any brand of nutrients?

Yes, absolutely. While it's optimized for the Canna nutrient line, its balanced calcium and magnesium formula is compatible with most other major fertilizer brands. Just remember to add it to your water first, before your base nutrients.

Do I need CalMag if my tap water is already hard?

If your tap water has a high EC/PPM due to calcium and magnesium carbonates (hard water), you may not need a full dose, or any at all. Always test your water first. The product is primarily designed for soft or RO water growers.

When should I stop using CalMag during the grow cycle?

You can use it from start to finish. Plants require calcium and magnesium throughout their entire life cycle, from building roots in vegetation to developing buds in flowering. Follow the Canna feeding chart for stage-specific recommendations.

What's the difference between this and other CalMag supplements?

Canna CalMag Agent is specifically engineered to work in harmony with their other products and is stabilized to maintain quality in the reservoir. Many growers report it mixes cleaner and causes less pH fluctuation compared to some other brands.

Personal Experience of Pevgrow’s CEO (Alan)

Let me be straight with you: I used to think CalMag supplements were just another bottle on the shelf, something for hydroponic purists. Then I switched to using reverse osmosis water in my coco grows to have total control. Big mistake to skip the CalMag! I started seeing those classic deficiency signs, and my yields suffered. Adding Canna CalMag Agent was a game-changer. It's like the glue that holds my entire nutrient schedule together now. My plants are visibly stronger, the stems are like little tree trunks, and I haven't seen a calcium or magnesium spot in years. I use it from week one right through to the final flush. The peace of mind knowing my base is solid is worth every penny. Is it magic? No. But it's the essential piece that makes all the other magic – the boosters, the PK spikes – actually work properly. Don't learn the hard way like I did.

Brands: Brands Canna


  • Is the shipping discreet?

    Yes, the shipment is 100% discreet, no one will know what you have bought, also the sender is SITE OF SHOPS ONLINE.

  • Do you ship worldwide?

    Yes, we ship to almost every country in the world although you need to know the current legislation in your country to make sure that you do not break any regulations with the germination of the seeds.

    UK: 3-4 days (express)
    USA: 4-5 days (express)
    Australia: 4-5 days (express)
    Japan: 4-5 days (express)
    Canada: 4-5 days (express)
    South Africa: 4-5 days (express)
    New Zealand: 5-7 days (express)
    View all

    The customer must be informed about the laws of their country regarding seeds or other products that may be purchased on our website, the possession of which may constitute a criminal offence in the country of receipt.

    We cannot be made responsible for the wrong use that some people decide to give to the seeds, so please don't act against your national laws.

    Due to problems with customs you can check here for restrictions to certain countries.

  • What payment methods and currencies do you accept?

    We accept the following payment methods: Bank transfer, Cryptocurrencies, cash, credit and debit cards and cash on delivery (Spain, Belgium, France, Italy, Portugal).

    You can change the currency on the top right to know the price of the products in your local currency and of course pay this way.

  • How long does it take to ship my order?

    In 24/48 hours we will ship your order.

  • Are the seeds guaranteed to germinate?

    If you live in a country where the cultivation of cannabis is legal and you decide to plant the seeds, it is good that you know that all the seeds that we commercialize have germination guarantee.

    If you germinate with the method of paper napkins and you have followed all the steps that we indicate here, you will only have to return us the seeds not germinated in their original packaging and when we receive them we will proceed to the change.

    Then we take care of requesting the return to the seed bank, we do not transfer this responsibility and time to our customers.

  • What if I receive a bad or damaged product?

    If you receive a broken product due to transport, you have to notify us within 24 hours for insurance coverage, always contact us as soon as possible and we will fix the problem!

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