Erysimum Species, European Wallflower, Siberian Wallflower, Tall Wormseed Mustard
Erysimumhieraciifolium

Family: Brassicaceae (brass-ih-KAY-see-ee)
Genus: Erysimum (er-RIS-ih-mum)
Species: hieraciifolium (hi-er-ay-see-ih-FOH-lee-um)

Synonym:Erysimum afghanicum

Synonym:Erysimum robustum

Category
Groundcovers
Perennials

Water Requirements
Average Water Needs; Water regularly; do not overwater

Sun Exposure
Full Sun
Sun to Partial Shade

Foliage
Evergreen
Herbaceous
Smooth

Foliage Color
Dark/Black

Height
6-12 in. (15-30 cm)
12-18 in. (30-45 cm)

Spacing
9-12 in. (22-30 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)
USDA Zone 9b: to -3.8 °C (25 °F)

Where to Grow
Can be grown as an annual

Danger

Bloom Color
Orange
Bright Yellow

Bloom Characteristics

Bloom Size

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

Other details

Soil pH requirements
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)

Patent Information
Non-patented

Propagation Methods
From seed; direct sow outdoors in fall
Direct sow as soon as the ground can be worked

Seed Collecting
Collect seedhead/pod when flowers fade; allow to dry
Allow seedheads to dry on plants; remove and collect seeds