lava

Lava is a bonsai soil amendment formed from crushed volcanic ash

layering

Layering, also known as marcotting, is a method of propagating a tree by ring-girdling the trunk and inducing roots to grow from the wound.

leader

The leader is the main shoot at the top of the tree.

lime sulphur

Line sulphur is used to paint jins and deadwood areas to bleach and preserve. Lime sulphur also controls fungi and other wood rotting diseases.