Hardy Hibiscus, Rose Mallow, Swamp Mallow
Hibiscus 'Red River'

Height

Spacing
4-6 ft. (1.2-1.8 m)

Hardiness
24-36 in. (60-90 cm)

Sun Exposure
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)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)

Bloom Color
Sun to Partial Shade

Bloom Time

Foliage
Red

Other details
Mid Summer

Propagation Methods
Herbaceous

Seed Collecting

Soil pH requirements
By dividing the rootball
From herbaceous stem cuttings
From seed; sow indoors before last frost
From seed; direct sow after last frost

Patent Information

Foliage Color
Allow pods to dry on plant; break open to collect seeds
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Bloom Characteristics

Water Requirements

Where to Grow