Espoma Organic Charcoal

Charcoal improves soil structure by increasing aeration and drainage. When mixed into potting soil, it creates small air pockets that prevent roots from sitting in stagnant water, which helps reduce the risk of root rot.

Yes, it is highly recommended for closed systems like terrariums. Layering charcoal at the bottom of a container without drainage holes helps filter the water and keeps the environment fresh, preventing odors and bacterial buildup.

No. This product is 100% untreated hardwood charcoal and is free from the chemical additives, accelerants, and binders found in grilling briquettes, which would be toxic to your plants.

A good rule of thumb is to mix about 10% to 20% charcoal into your potting mix. For moisture-sensitive plants like succulents, you can lean toward the higher end to ensure maximum drainage.

Charcoal is generally pH neutral or slightly alkaline. While it won't drastically alter your soil chemistry, it is a safe, inert amendment that works well with most standard potting mixes without causing significant pH swings.