Evaluating Hibiscus Survival After Hard Freeze: The Phloem Scratch Test

Hibiscus in Mid‑20s°F Freeze

If the ground froze, the plant is likely dead. If only air froze, it may regenerate.

Test

1. Scratch a small bark patch on the trunk.
2. Green phloem = alive; monitor 2 weeks for new buds.
3. Brown = dead; replace.

Quick field test guides your decision.