Overwintering Potted Rose Mallow (Hibiscus) on Long Island

Rose mallow (often confused with Lavatera) is likely a perennial hibiscus. Potted shrubs on Long Island sometimes survive winter outdoors, but roots are far less cold‑hardy than tops.

Survival Strategies

• Bury the pot in leaves and cover with a trash can during deepest cold (mid‑Dec to early Mar).
• Better: plant in the ground as soon as possible next spring.
• Use Messenger Harpin Protein at transplant to boost recovery; no fertilizer needed.

Ground planting is the only reliable long‑term solution.