Hardy Hibiscus, Rose Mallow, Swamp Mallow
Hibiscusmoscheutos 'Heartthrob'

Height

Spacing
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)

Hardiness

Sun Exposure
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)

Bloom Color
Full Sun
Sun to Partial Shade

Bloom Time

Foliage
Scarlet (dark red)
Maroon/Burgundy

Other details
Mid Summer
Late Summer/Early Fall

Propagation Methods
Herbaceous
Velvet/Fuzzy

Seed Collecting

Soil pH requirements

Patent Information

Foliage Color

Bloom Characteristics

Water Requirements

Where to Grow