To prune a ginseng ficus, which is a common species of bonsai tree, pinch off new growth to retain the tree's miniature shape. Bonsai Boy recommends leaving a small amount of new growth each time the tree is pruned to sustain the health of the tree. Tropical and subtropical trees such as the ginseng ficus should be pruned several times per year based on the tree's individual rate of growth.
Trim back up to half of the new growth on the ginseng ficus every time it grows six to 10 new leaves. Always prune the tree in both spring and fall. In fall, prune the ginseng ficus after the year's growth has stopped. Once or twice per year, preferably in spring when re-potting, trim the tree's roots one-third to one-half of their size. To create root patterns above the soil line, trim wedges in the tree's rootball, located directly under the crown of the tree.
The Garden Guides suggests using concave clippers when pruning the ginseng ficus to prevent scarring on the plant. The ginseng ficus is also known to bleed sap after sharp cuts, making it important to use dull clippers for pruning. This plant is a good choice for beginner bonsai cultivators, as it is very easy to grow.