Notable Hibiscus Varieties: Swamp, Giant Rose Mallow, and Philip Island

Overview

Over 200 hibiscus species grow worldwide in warm climates. Their brilliant, long-lasting blooms make them iconic tropical ornamentals.

Swamp Hibiscus (Hibiscus diversifolius)

Sprawling shrub across Africa, New Zealand, Australia, Americas, Pacific Islands. Low frost tolerance; dry, sunny swamps/coasts. Prickly stems, bright green foliage. Pale yellow blooms with deep crimson centers, spring through autumn.

Giant Rose Mallow (Hibiscus grandiflorus)

Largest U.S. hibiscus blooms (6 inches). Pale pink petals, deep red center. Southeastern U.S. brackish waters. Mid-summer to fall; flowers last one day but continuous production. Full sun, not drought-tolerant.

Philip Island Hibiscus (Hibiscus insularis)

Critically endangered, native only to Philip Island (south of Norfolk Island, off Australia). Australian law protects it; ornamental cultivation aids survival. Striking lilac petals with hot pink center.