Beginner Bonsai Repotting Guide – Chinese Elm Repotting Example

Installing bonsai mesh over drainage holes before repotting a Chinese Elm bonsai

Before placing your tree into its new container, prepare the bonsai pot by covering the drainage holes with mesh screen. The mesh prevents soil from escaping while still allowing excess water to drain freely.

Add a layer of coarse bonsai substrate, such as lava rock, to the bottom of the pot. This drainage layer helps prevent water from remaining around the roots and creates a healthier environment for root growth.

Adding a drainage layer of lava rock to a bonsai pot before repotting a Chinese Elm

Removing old soil from the roots of a Chinese Elm pre-bonsai during repotting

Carefully remove the Chinese Elm pre-bonsai tree from its nursery container. Using a root rake or chopstick, gently loosen the existing soil and begin exposing the root system.

Take your time during this process. Healthy roots should be handled carefully to minimize unnecessary damage.

Place the root ball on top of the drainage layer and position the Chinese Elm bonsai in the desired location. Take time to consider the front of the tree and the overall presentation before adding the final soil.

Positioning a Chinese Elm bonsai tree in a new ceramic bonsai pot

Adding fresh bonsai soil around the roots of a Chinese Elm bonsai

Add fresh bonsai soil around the root system, gradually filling the spaces between the roots. A quality bonsai soil mixture provides both moisture retention and proper airflow. In this Tutorial we are adding pure lava rock sifted and rinsed to remove the powder and very small pieces. I left a good amount of the organic soil on the root ballto mix in with a little bit of perlite to maximize oxygen retention and airflow.

Use a chopstick to gently work the new soil throughout the root system. This removes air pockets and ensures the roots have good contact with the fresh substrate.

Working bonsai soil into the roots of a Chinese Elm using a chopstick

After repotting, water the tree thoroughly until water flows freely from the drainage holes. This settles the soil around the roots and helps the tree begin adjusting to its new container.

Aftercare Following Repotting

After repotting, place your Chinese Elm bonsai in a protected location while it recovers. Avoid heavy fertilization immediately after repotting and allow the roots time to establish themselves in the new soil.

With proper aftercare, your Chinese Elm will begin producing new growth and continue developing into a healthy bonsai tree.