Replanting bonsai trees is a relatively easy process but requires some time and attention. Bonsai trees get great benefits from the repotting process. Repotting prevents root starvation, increases the nutrient base and provides the tree with more growing space. Though bonsai trees can be replanted at any time, early spring is the ideal time to replant a healthy bonsai.
Choose a container that fits the your bonsai tree's new size, providing an additional two to three inches for the growing tree.
Remove the tree from its current container and place it on a mat or table. Inspect the tree's root system. Remove the excess dirt from the root system. Gently unbind the root system so the roots are loose. Remove any damaged or excess roots using a sharp, sterile scissors. Act quickly to prevent the roots from drying out.
Line the bottom of the container with mesh, then add a layer of a nutrient-rich potting soil. Set the bonsai tree in the container. Spread the root system comfortably in the potting container. Fill the remaining space of the container with soil. Pack the soil lightly to promote good aeration.
Prune the tree's branches and foliage to promote vigorous growth and good air circulation.
Water the bonsai tree immediately after repotting it. Immerse the repotted bonsai tree in tepid water until the water bubbles cease. Remove the bonsai from the water and place in a partially shaded area for several days.
Wait three to four weeks before fertilizing the repotted bonsai. Then, fertilize the bonsai with a well-balanced fertilizer using half strength. Do not fertilizing the tree when the soil is dry or the tree shows signs of disease.