Biochar Booster
Add the benefits of biochar to any soil — without repotting.
Biochar Booster is a pure amendment — not a complete potting mix. It's designed for plants that are happy in their current pot but could use a soil upgrade. Sprinkle it on top, water it in, and the biochar gets to work improving drainage, feeding beneficial microbes, and sequestering carbon into your soil long-term. Think of it as a tune-up for soil that can't be replaced right now.
Soil Mates
Biochar Booster is made for the garden — a powerful soil amendment that helps everything from tomatoes to tulips grow stronger, stay hydrated, and thrive through the season.
Vegetables like Tomatoes, Peppers, Cucumbers, Zucchini, Carrots, and Beans love the extra drainage and nutrient-holding power.
Herbs like Basil, Oregano, Mint, and Parsley benefit from improved root health and better water flow.
It also supports flowering plants like Marigolds, Sunflowers, Zinnias, and Dahlias by enriching the soil microbiome and retaining key nutrients.
You can also add it to potting soil for fruit trees, raised beds, or container gardens — or mix it into the soil at planting time for long-term improvement.
The best part? It stays in your soil for years, giving your plants (and the planet) a lasting boost.
How To Use
Pro-Tips
Biochar tends to settle, just shake bag before use.
When your first use Rosy, you might notice it stains your hands black. It washes right off! If you notice the water in your plant saucer looks dark, it's just the biochar and it's a good thing!
Because of the beneficial fungi in our mixes, Rosy Soil occasionally sprouts a few mushrooms. There's nothing wrong with your soil, quite the opposite!
FAQ
Rosy potting mixes are complete growing mediums — everything a plant needs. Biochar Booster is an amendment, designed to be added to existing soil. Use it on plants that don't need repotting but would benefit from better soil.
Biochar is produced through pyrolysis — organic material heated at high temperatures without oxygen, creating a stable porous carbon structure. Regular charcoal (including BBQ charcoal) is not biochar and should never go near plant soil.
This 8qt bags amends 5 CU. FT. or covers 32 SQ. FT.
Biochar's benefits are well-documented in peer-reviewed agricultural research from Stanford, Cornell, and institutions worldwide. The key is application rate and pre-charging with nutrients and biology — exactly what Biochar Booster is formulated to do.
Better soil, bag by bag. The upgrade that sticks around.
Shop Rosy Biochar BoosterAlready loving it? Your plants might need more.
Rosy Soil's Plant Food is the perfect companion to all our soil products, providing an extra boost of nutrition for your plants. Packed with essential minerals and nutrients, it enhances the effectiveness of your houseplant potting soil, succulent soil, and other soil mixes. Use it to ensure your plants stay healthy and vibrant all year long. It's ideal for various types of plants, from herbs to succulents, helping them grow strong and flourishing.