Red Alder, #2318

Left Coast Bonsai, Red Alder (Alnus), $50. May 2023.

Though short, the trunk is stout and curved. Partial defoliation or large leaves, as grower noted that it responds well to reducing leaf size.

  • LCB cautions that Alders do not respond well to major cuts—can give up and instead give off shoots.

  • When pruning, leave 2” from the last branch—else it will die back through the branch. Once it dies back, it can be trimmed.

  • Can defoliate completely a few times each growing season.

  • Avoid wiring as it grows so fast in length and width that wire bite must be caught early.

  • Air layering is possible, roots quickly.

  • Likes lots of water—like birch and aspen, it is a river tree.

Jan 2025 Repot

  • Next to wire branches with movement or lateral. Identify the apex. Prune to first bud.

Dec 2024 Next to inspect roots and repot in inorganic soil


Was curious if the apex and foliage needed to center back over the base for balance. This example from “Bonsai—A Patient Art” shows asymmetry is acceptable. (Oriental Bittersweet)