Bonsai soil
Using the right soil mixture for your Bonsai trees is important since soils like all-purpose potting soil or other poor bonsai soils often retain water for too long and harden easily when they get dry, which makes proper watering very difficult for you.
A compacted organic soil that lacks structure also lacks aeration and drainage which deteriorates the overall health of your tree and could be fatal to your Bonsai.
When choosing a good Bonsai soil, it should include components like Akadama, Pumice, Lava rock, organic potting compost and fine gravel or grit.
Akadama
N eeds to be sifted before use, and bear in mind that it takes about two years for it to start to break down, which reduces aeration.
Pumice
I s a soft volcanic rock that absorbs water and nutrients and also provides the soil with drainage.
Lava rock
H elps retain water and creates a good structure when used as part of a Bonsai substrate.
All-purpose potting soil
R etains too much water on its own and doesn't allow for proper aeration and drainage, but is great to use in a Bonsai soil mix.
Fine gravel / grit
H elps to create a well-draining and aerated Bonsai soil. It is also used as a bottom layer in Bonsai pots to enhance drainage.
Mix your own
If you want to mix your own Bonsai soil you can mix equal parts of
Akadama
Pumice
Lava rock
