Repotting

All potted plants will eventually outgrow their containers. While houseplants need to be "potted-up", that is, placed in larger and larger containers, the miniaturization of a bonsai trees is maintained by keeping the roots confined to the small container. On average, repotting will be necessary every 3-5 years, but the tree should be removed from its container and its root system inspected once a year. If the roots form a circular ball around the perimeter of the pot, it is time to trim the roots and repot.

When repotting remember to:
- Use only bonsai soil

- Remove air pockets by working the soil down through the roots

- Do not remove more that 20% of the root system

- Repot during the appropriate repotting season

- Water well and keep out of the sun for a week or two

Bonsai are generally repotted and root-pruned around springtime just before they break dormancy. Bonsai are generally repotted every two years while in development, and less often as they become more mature. This prevents them from becoming pot-bound and encourages the growth of new feeder roots, allowing the tree to absorb moisture more efficiently.