Tinyroots Horticultural Charcoal for Bonsai Soil and Custom Potting Mixes
Tinyroots Horticultural Charcoal is a porous soil additive used primarily in custom bonsai soil blends, though it can also be used in orchid mixes, terrariums, and other container plantings.
In bonsai, horticultural charcoal is typically used in small amounts as an optional ingredient in a broader aggregate mix. Growers add it when they want another coarse, lightweight, porous particle to help keep the soil blend open and breathable.
Why Some Bonsai Growers Add Charcoal
- Adds another porous component to a custom soil blend
- Helps keep the mix open and airy
- Useful for growers who like to fine-tune their own aggregate recipes
- Can be blended with akadama, pumice, lava rock, or calcined clay
How Much Should You Add?
Horticultural charcoal is usually used in small amounts, not as a main ingredient.
- Good starting point: about 2% to 5% of your total soil mix by volume
- Use it as an additive: not as a replacement for core bonsai aggregates like akadama, pumice, or lava rock
- Adjust slowly: if you like how it performs in your mix, you can fine-tune from there based on your trees, climate, and watering habits
If you are new to using charcoal in bonsai soil, start light. A little goes a long way.
Best for Custom Mixers
This product is best suited for bonsai growers who like building their own soil blends and experimenting with small adjustments to structure and particle diversity. It is not usually considered a primary bonsai soil ingredient, but rather an optional additive for growers who want more control over their mix.
Also Useful for Other Plants
Although this product is listed primarily for bonsai use, it can also be used in orchid mixes, terrariums, vivariums, and other container plantings where a coarse, porous additive may be helpful.
A Useful Optional Additive
If you mix your own bonsai soil, horticultural charcoal can be a useful ingredient to keep on hand. It is best used in moderation as part of a broader aggregate-based mix, especially for growers who want to fine-tune soil structure for their trees.
Learning Resources and Bonsai Tree Care Guides:
Bonsai trees are not all the same - and neither is their care. Read our specific care sheets for individual bonsai species. Read the Bonsai Care Guides
Shipping Bonsai Trees:
Bonsai trees are generally shipped on Mondays & Tuesdays to avoid having them stay in the boxes for any extra time over the weekends.
Shipping Non-Tree Items
All non-bonsai items such as bonsai pots and bonsai supplies are shipped within 48 hours of receiving payment. Most orders are shipped either the same day or the next day, depending on the time of day the order is received.
Important Guidelines:
** We cannot ship to a FPO, APO, P.O. Box or to locations in Alaska, Virgin Islands, Puerto Rico, Hawaii or anywhere internationally.
** All Bonsai are shipped direct from the nursery and may ship separately from other items purchased via the Bonsai Outlet.
** If extreme weather is expected, we may delay shipping your Bonsai tree to guarantee a healthy arrival; in such a case we will contact you. We are shipping living trees and must be conscious of the temperature conditions to the delivery address, as well as, while in transit. That said, we reserve the right to hold the tree(s) to guarantee a healthy delivery. We will Hold Your Tree Until It is Safe to Ship.
