Wallflower Siberian Erysimum Allionii, Cheiranthus Allionii, Erysimum × Marshallii is a bushy biennial or perennial variety native to the Canary Islands, and the plant has naturalized throughout much of northern North America. Wallflower Siberian seeds can be started directly outdoors in fall, and this wallflower produces the clusters of vibrant, fragrant orange yellow flowers above a canopy of evergreen foliage. The phlox-shaped flowers bloom in spring and summer attracting a wide range of pollinators including bees and butterflies.
Wallflower Siberian looks striking in a wildflower meadow, and it is also a popular flower for growing in rock gardens, large containers, beds, and borders. Cheiranthus Allionii seeds can be started indoors in winter or early spring, and growing Siberian Wallflower prefers full sun and adapts to poor soil perfectly tolerating even clay. As a cut flower, Siberian Wallflower makes a good choice for floral arrangements.
Height: 18-24 Inches
Bloom Season: Spring/Summer
Environment: Sun/Partial Shade
Soil Type: Average/Poor/Dry/Moist well-drained, pH 6.1-7.3
USDA Zones: 3-9 ( As Biennial ) 10-11 ( As Perennial )
Sow Indoors: Winter/Spring (6-8 weeks before last frost)
Sow Outdoors: Spring/Fall
Seed Depth: 1/8 Inch
Germination Time: 14-27 Days