Viola, Garden Violet
Viola 'Roscastle Black'

Category
Perennials

Water Requirements
Requires consistently moist soil; do not let dry out between waterings

Sun Exposure
Full Sun
Sun to Partial Shade

Foliage
Evergreen

Foliage Color

Height
under 6 in. (15 cm)

Spacing
15-18 in. (38-45 cm)

Hardiness
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)

Where to Grow
Can be grown as an annual

Danger
N/A

Bloom Color
Dark Purple/Black
White/Near White

Bloom Characteristics
Flowers are fragrant

Bloom Size

Bloom Time
Mid Spring
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall

Other details

Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information

Propagation Methods
By dividing the rootball
From herbaceous stem cuttings

Seed Collecting
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed