Azalea bonsai trees require an acidic soil mix. You can create your own soil mix by combining equal parts of peat moss, perlite, and pine bark. When potting your azalea tree, be sure to use a ...

Old potting soil can also be used, but should be sterilized first. Avoid any type of soil containing fertilizer, as new seedlings do not require this. Flowering azaleas tolerate normal room ...