Bonsai Root Cutters vs. Knob Cutters

Root Cutters

• While the root cutter could be considered an optional item in a beginner's tool kit, it serves a vital purpose. The root cutter, with its sturdy blade, is designed to be rugged enough to withstand encounters with pebbles and thick roots. This tool can be used to cut thick or tough roots without damaging nearby root tissue.

Root Pruning

• Begin root pruning by removing the bonsai plant from its pot. Carefully work all the soil from the bottom of the plant's roots, then remove it from the top. Once most of the soil is removed, cut the longest roots using the root cutter. Remove any roots that are fat, bent or bumpy. Also remove roots that are growing in odd positions, such as those crossing other roots and roots that are growing straight down. Aim to retain roots that spread out in all directions; these are the best for growing well-shaped bonsai.

Knob Cutters

• Another specialty tool, the knob cutter, is made specifically for cutting and pruning branches on a bonsai tree. It can also be used to shear protruding stubs that are left by other pruning tools. If roots are clean and visible, a knob cutter can be used to trim roots out in tight spots with a high amount of precision. However, this implement cannot be used to handle hard materials as well as a root cutter, so you must be sure that what you're cutting is a root and not a rock.

Branch Pruning

• Branch pruning is vital to creating the shape of the bonsai. By removing whole branches, bonsai trees are thinned and forced to grow in specific directions. Once you have settled on a shape for your bonsai, use knob cutters to remove branches right up against the trunk of the tree. The shape of this tool allows you to scoop a small portion of the branch out so that the scar will heal flat against the trunk.