Overwintering Hibiscus in Zone 4b: Tropical vs. Hardy

If your hibiscus has glossy leaves and prominent stamens, it's tropical—bring it indoors to a bright, cool (55–65°F) spot. If it's a hardy hibiscus (Hibiscus moscheutos), mulch heavily like your azaleas and roses; many cultivars survive zone 4b with protection. Check the label or ask the seller for exact hardiness.

Key Distinction

• Tropical: Must be houseplant in winter.
• Hardy: Dies to ground, returns from roots; mulch 6–8 inches after freeze.

When in doubt, treat as tropical and overwinter indoors.