Potting Mix - made with Biochar

No reviews No reviews


Sustainably produced, peat-free soil that naturally supports healthy plant growth.

Carbon neutral

Made In The US

Recyclable Packaging


Premium potting soil, made from biochar, compost, mycorrhizae and pine bark fines. Free from peat & synthetic additives.

Carbon-Negative Biochar

Biochar, the core of this mix, enhances the soil’s nutrient and water retention. It also improves soil porosity (which enables plant roots’ development and prevents root rot). This creates the best conditions for your houseplant to flourish!

Each ton of biochar produced captures three tons of CO2 from the carbon cycle, preventing it from contributing to climate change. 

This makes it an ideal, earth-friendly soil amendment — unlike conventional houseplant soil ingredients like peat moss, coconut coir (coco coir), perlite, and vermiculite. 

Root Boosting Mycorrhizae

Mycorrhizae (mahy-kuh-rahy-zee) are houseplant friendly fungi that create a beneficial fungal structure on plant roots. 

How does that help?

It improves your plant’s ability to absorb water and nutrients, allowing them to make the most of our fertile indoor potting soil.

Moreover, mycorrhizae release a gum-like substance called glomalin that helps to further lock in moisture and nutrients. 

Pine Bark Fines

Pine bark fines are a natural, eco-friendly ingredient that improves the texture and structure of our indoor plant soil mix.

The small, finely ground pieces of pine bark increase the porosity of the soil, allowing for better air flow and water drainage. This supports healthy root growth, prevents root rot, and enhances nutrient uptake, ultimately leading to thriving houseplants.

Pine bark fines are sustainably sourced from the byproducts of the timber industry, reducing waste and supporting a circular economy


Aged compost adds abundant organic matter to the indoor plant soil mix, improving the soil structure and drainage. 

It’s also a natural source of essential plant nutrients, like nitrogen and potassium. This reduces the need for chemical fertilizers, which acidify soil and harm soil microbes when used excessively. 

More broadly, composting upcycles organic waste that normally goes to landfills and emits greenhouse gasses.

Most commercial potting mixes contain peat, the mining of which releases huge amounts of carbon into the atmosphere. Not only does this product leave the peat (and carbon) in the ground where it belongs, but the process used to produce the biochar in this potting soil actually removes carbon from the atmosphere.

Guaranteed Analysis 0.72-0.22-0.37

Total Nitrogen (N) ..................................0.72%

     0.72 % Water Insoluble Nitrogen

Available Phosphate (P2O5)...................0.22%

Soluble Potash (K2O).............................0.37%

Derived from green compost and wood waste compost


Soil Amending Guaranteed Analysis

Active Ingredients

     Rhizophagus irregularis.........2.3 propagules/cm3

     Funneliformis mosseae..........2.1 propagules/cm3

     30% Biochar derived from pine wood

Inert Ingredients

     70% Total Other Ingredients (inert as non-plant food ingredients)

Biochar reduces soil density and increases soil aeration.

Mycorrhizae may promote root mass expansion and nutrient efficiency.

Pots/planters, some good quality seeds, and a source of light


Pre-moisten your indoor potting mix before adding it to your pots.

You can do this by adding the soil mix for indoor plants into a separate container and watering it until it releases a few drops when squeezed. 

Pot or repot

Fill the base of a well-draining container with the pre-moistened indoor soil mix.


If you are replanting, then slowly release your plant from its current soil, loosening the root ball and removing any soil debris. Then, set the plant into the container with the indoor potting soil mix. Finally, fill the space with more soil, leaving an inch at the top for easy watering. 

If you're starting from seed, then follow the instructions provided with that specific seed type.  

Nutrient Dense

Boosts soil aeration, drainage, and nutrient uptake to help plants flourish


Plant-based packaging in convenient sizes for indoor plant parents


Made from eco-friendly, high-quality ingredients (biochar, compost, mycorrhizae, pine bark fines) and is free from peat & synthetic additives.

Which Microgreens Kit Is Right For You?

Growing Methods hydroponic Hydroponic hydroponic soil soil hydroponic
Growing Medium Proprietary ‘seed quilts’ made from coconut fiber Virgin fluff fibers produced from non-chlorine bleached spruce wood none coco coir coco coir Jute matt
Includes a light no yes no no no no
Included seeds 2 varieties - varies 3 varieties Red Cabbage, Radish and Mustard none 4 varieties. Radish, Arugula, Beets and Tatsoi 4 varieties. Arugula, Beets, Komatsuna and Radish 6 varieties. Radish, Kale, Rainbow Mix, Mustard, Spicy Mix and Broccoli
USDA Organic Seeds? Some, not all Yes NA No No Yes
Grow Area 1 x Large 3 x Medium 1 x Medium/Large 1 x Small 1 x Medium 3 x Small
Refill Cost $$ $$$ $ $$ $$ $$

Which Grow Light Is Right For You?

Wattage 20W / 40W 20W 11W 16W / 32W 7W
PPF Small: 23.7 μmol/sec; Large: 42 μmol/sec 25.95 μmol/sec 17 μmol/sec - 7.3 μmol/sec
Efficacy (PPF/W) 1.05 - 1.2 1.3 1.55 - 1.05
Color Temperature 3000K 3000K 3000K 3914K 2700K
Mounting Hanging from wall or ceiling Inside a pendant or desk lamp Under cabinet or on a wall Under cabinet, wall or vertically Inside a pendant or desk lamp
Suitable For Anything Anything Houseplants, Herbs, Leafy Greens Anything Small herbs, seed starting
Water Resistant No No No Yes No
Cost $$$ $$ $$ $$ - $$$$ $

Check Out Some Of Our Other Products

Share your best answers

Check Out Some Of Our Other Products

Share your best answers


Peat moss has been a common ingredient in commercial potting mixes since the 1960s. However, it's obtained by extracting peat bogs, which are vital ecosystems that store carbon. Rather than release that carbon into our atmosphere, this product uses biochar as its base.

Rosy’s indoor potting mix is all-natural, peat free, and made from biochar. 

They've consciously sourced ingredients not only because they’re great for your plants but also because they’re good for our planet. 

Unlike traditional potting soil ingredients that are environmentally taxing, biochar potting mix only contains natural and carbon-negative amendments.

They use carbon-negative, organic ingredients to create the best indoor plant potting mix.

Typically, these organic materials are sent to a landfill, where they release methane and CO2 — two potent greenhouse gases. But by redirecting these organic materials from landfills and stabilizing their carbon structure, we prevent the release of those greenhouse gases.

Essentially, they turn our house plant soil into a carbon sink, which means it helps to remove CO2 from the atmosphere.

Yes! You can add Rosy to your current houseplant potting soil — whether it’s an inorganic or organic potting soil mix, cactus or orchid mix, or otherwise. 

Doing so will help you refresh your old soil and revive its benefits for plant care. 

Alternatively, you could directly replace your current houseplant soil mix with Rosy.

The 8 Quart bag will fill:

4 to 6 medium 6" pots

The 4 Quart bag will fill:

2 to 3 medium 6" pots

Customer Reviews

Be the first to write a review