Rose of Sharon, Shrub Althea
Hibiscussyriacus 'Purple Pillar'

Height

Spacing
6-8 ft. (1.8-2.4 m)

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

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)

Bloom Color
Sun to Partial Shade

Bloom Time
N/A

Foliage
Blue-Violet

Other details
Mid Summer
Late Summer/Early Fall

Propagation Methods
Deciduous

Seed Collecting

Soil pH requirements
From softwood cuttings
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
Direct sow as soon as the ground can be worked
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

Bloom Characteristics

Water Requirements

Where to Grow