Leaf Mold – What Is It?

Q: What is leaf mold? It is one of the items suggested for bonsai soil.

A: Leaf mold is just composted leaves. This is in contrast to “compost” which has had green things added to the mix to speed up decomposition. Leaf mold is mostly used as a soil conditioner, to improve drainage. Compost is used to increase drainage AND enrich the soil.