Siberian Wallflower (Erysimum × allionii) Organic Seeds – Vivid Orange Clustered Blooms, Fragrant Biennial, Cold-Hardy, Borders & Cutting Gardens

Minimum: 200+ seeds

Vivid Orange That Blooms When Little Else Does

Most gardens are still waking up when Siberian Wallflower hits its stride, covering itself in dense clusters of vivid orange flowers that carry a genuine, sweet fragrance on the air. This cold-hardy biennial bridges the gap between early spring bulbs and summer annuals, filling borders and cutting gardens with color exactly when it's needed most. Bred as a hybrid selection prized for its intensity of color and reliable cold tolerance, it's become a staple for gardeners wanting more than a few scattered blooms during the slow transition into summer.

Who Grows Siberian Wallflower?
The border gardener wanting vivid, saturated color during the spring transition.
The cutting garden grower wanting fragrant stems for small indoor arrangements.
The cold-climate gardener needing a genuinely cold-hardy biennial for reliable bloom.
The organic gardener seeking certified organic seed for a chemical-free growing practice.

What This Fragrant Cold-Hardy Biennial Actually Is
Erysimum × allionii, called Siberian wallflower, is a hybrid biennial in the mustard family, valued for dense clusters of vivid orange flowers and genuine fragrance. Plants form a low rosette in their first year, then send up flowering stems 12 to 18 inches tall the following spring, covered in clustered, four-petaled blooms that open over several weeks. The sweet fragrance carries well in the garden and makes cut stems a pleasant addition to small arrangements. As a true biennial, it requires a cold period to trigger flowering, making it reliably cold-hardy and well suited to regions with real winters. Hardy in zones 3 through 7, it is often grown as a cool-season annual in milder climates where it may bloom the first year from an early start.

In the Garden & Vase

• Spring and early summer borders: Plant in drifts for a vivid block of orange color during the transition.
• Cutting garden: Grow rows for fragrant cut stems that bring both color and scent indoors.
• Pollinator support: Let plants flower fully for an early nectar source during a leaner bloom period.
• Rock garden and edging: Use its compact form along borders, edges, or rock garden plantings.
• Fragrance garden: Plant near a path or seating area where its sweet scent can be appreciated.
• Cold-climate biennial planting: Grow where a real winter chill reliably triggers strong spring flowering.

Growing Siberian Wallflower Seeds

• Start method: Direct sow in late summer for bloom the following spring, or start indoors in early spring.
• Germination: Sprouts in 10-14 days.
• Soil temperature: Best 60-70°F.
• Sunlight: Full sun to part shade.
• Soil: Well-drained soil of average fertility; avoid heavy, poorly drained ground.
• Watering: Consistent moisture while establishing; moderate once mature.
• Life cycle: True biennial, a rosette the first year and flowering the following spring.
• Overwintering: The rosette tolerates real cold, needed to trigger spring flowering.
• Bloom time: Flowers mid to late spring, bridging spring bulbs and summer bloom.
• Deadheading: Remove spent stems to tidy the planting and encourage continued bloom.
• Hardiness: Reliable to zone 3; genuinely cold-hardy as a biennial.
• Seed note: Certified organic seed, grown and handled to organic standards.

Before You Close This Page
This is the flower that fills the color gap most gardens have in late spring, vivid orange blooms with genuine fragrance right when little else is putting on a show. Siberian Wallflower is a true cold-hardy biennial, needing a real winter chill to deliver its best flowering the following spring. It works equally well massed in a border, cut for small arrangements, or tucked along an edge where its scent can be enjoyed. Grow the wallflower that turns the slow season into a genuine highlight.