Stewart suggests blending organic compost with pumice, gravel or sand, and Akadama, a Japanese clay designed for bonsai. To skip this step, purchase Harris Bonsai Soil or a similar product.

Guava Bonsai trees grow well in well-draining soil. You can create your own soil mix by combining equal parts of peat moss, perlite, and sand. When potting your guava tree, be sure to use a ...