Dolomite THC – Calcium & Magnesium Corrector & pH Stabilizer

You want a harvest that rocks, not yellow leaves that drop. Dolomite by THC is the secret weapon for soil growers who want to guarantee a stable pH and a constant supply of Calcium and Magnesium from day one, ensuring your plants have the solid foundation they need to thrive.

Why your soil needs Dolomite (PAS)

Are you tired of seeing mysterious yellow spots on your leaves even though you feed them correctly?
It is one of the most common frustrations in cultivation: you buy expensive nutrients, but the plant looks sick. Often, the problem isn't a lack of food in the bottle, but the soil's chemistry failing. If the pH drops too low (becomes acidic) or there isn't enough background Calcium, the roots simply lock up.

The cost of ignoring soil chemistry is a mediocre harvest.
Ignoring this leads to "nutrient lockout." You pour money in the form of fertilizers, but the plant starves in a sea of food. The result? Stunted growth, weak stems, and buds that never fatten up. Trying to fix a severe Calcium deficiency or a crashed pH in the middle of flowering is stressful and often too little, too late.

The solution is to prep your soil right from the start.
By mixing Dolomite by THC into your substrate before you plant, you create a safety net. It acts as a natural pH buffer, keeping acidity levels in the sweet spot (6.5–7.0) where cannabis thrives, while slowly releasing the essential minerals your crop needs to build structure.

Quick spec sheet of Dolomite THC

• Brand: THC Nutrients
• Product Type: Solid mineral amendment (Powder)
• Format: 500g container
• Composition: Calcium Carbonate and Magnesium Carbonate
• Function: pH stabilizer and deficiency corrector
• Application: Mixed into substrate (Soil/Coco)
• Dosage: Approx. 1g per liter of soil

Key advantages over liquid CalMag

While liquid additives are great for quick fixes, Dolomite offers a structural solution for the entire cycle.

• Long-term pH Stability: Unlike liquids that wash away, Dolomite stays in the pot, continuously neutralizing acidity as organic matter breaks down.
• Impossible to Overdose: Because it is a slow-release mineral, it won't burn your roots like concentrated chemical salts might.
• Improves Soil Structure: It helps aerate the medium, which pairs perfectly with high-quality Soil For Cannabis.
• Microbial Booster: It creates the perfect environment for beneficial bacteria and fungi to colonize your root zone.

Real benefits you’re going to notice

When you use Dolomite, you stop fighting your soil and start working with it. The most obvious benefit is visual health: your plants maintain a lush, deep green color because they always have access to Magnesium, the core of the chlorophyll molecule.

You will also notice explosive root growth. Calcium is essential for cell division and root tip development. With a steady supply, your plants establish faster after transplanting. Plus, by keeping the pH stable, you ensure that all the other Cannabis fertilizers you use are actually absorbed, maximizing the return on your investment.

Step-by-step usage guide

1. Prepare your mix: Pour your substrate (soil or coco) into a large container or tarp.
2. Dose correctly: Add 1 gram of Dolomite for every liter of soil. (e.g., 50g for a 50L bag).
3. Mix thoroughly: Turn the soil over several times to ensure the powder is evenly distributed.
4. Water lightly: Moisten the soil slightly to activate the minerals before filling your pots.
5. Plant: Your medium is now buffered and ready for seeds or clones.
6. Maintenance: For long outdoor grows, you can top dress (sprinkle on top) halfway through the season if needed.

Frequently Asked Questions

Can I use Dolomite to fix a deficiency in flowering?

Yes, you can sprinkle it on the surface of the soil and water it in (top dressing), but it is slow-acting. For immediate fixes in flowering, a liquid chelated Calcium/Magnesium is faster, but Dolomite prevents the issue from returning.

Is it compatible with organic growing?

Absolutely. It is a natural mineral rock that is 100% compatible with organic farming and works great alongside worm castings and Universal Substrate mixes.

Does it expire?

As long as you keep it dry, it is a mineral that does not degrade. The 500g tub can last you for several crops.

Can I use it in hydroponics?

No, Dolomite is not water-soluble enough for hydroponic reservoirs and will clog your drippers. It is designed for solid substrates like soil or coco coir.

Personal Experience of Pevgrow’s CEO (Alan)

I consider Dolomite a staple in my garden shed, especially when I'm recycling soil or using peat-based mixes that tend to be naturally acidic. I've learned that adding a tablespoon per pot saves me so many headaches later on. It's one of those "set it and forget it" products. If you are growing in soft water areas, this is practically mandatory to give your water the buffer it lacks. It’s cheap insurance for your crop.