Training Rose of Sharon into a Single‑Trunk Tree Form

To create a tree‑form Rose of Sharon (Hibiscus syriacus):

1. Select the most upright of the three trunks.
2. Using a pruning saw, remove the other two: first cut halfway to reduce weight, then flush to the main trunk.
3. Do this in fall when sap is descending.
4. Skip wound sealant—modern research favors natural healing.
5. Stake at 45° on the windward side with a tree tie.
6. Next spring, rub off any shoots on the lower trunk to force energy into the leader.

Repeat annual pruning to maintain form. The plant will regain tree shape over a few seasons.