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Siberian Wallflower
Seed Packet

Siberian Wallflower

Cheiranthus allionii
Radiant orange clustered petals bloom above the narrow green foliage of Siberian wallflower. Sunny days will bring visiting butterflies and bees. Citrus-hued and sweet scented, it enlivens well-drained garden edges in summer.
SKU #S1853
$3.25
Details
Approximate Seeds Per Packet
550
Lifecycle
Biennial
Perennial Hardiness Zone
7,
8,
9
Annual Hardiness
Half Hardy Annual
Mature Size
1-1.5' h x 8" w
Sun
Full sun
Soil
Regular to rich, well-drained
Season
Spring to summer
Color
Clusters of four-petaled orange flowers
Features
Great for containers
Great Cut Flower
Heat or Drought Tolerant
Attracts Butterflies
Attracts Bees
Attracts Hummingbirds
SOWING INSTRUCTIONS
Depth:
Light cover 1/8"
Sprout Time:
10-14 days
Starting Indoors:
Sow indoors in pots 10-12 weeks before last frost for first-year bloom. Pinch and grow cool (55-70°F) until transplanted.
Starting Outdoors:
Direct sow in fall in warm winter areas (zones 8-9).
WHEN TO SET OUTSIDE
At last frost date.
PLACEMENT & CULTIVATION
Siberian wall flower is variuously described as an annual, biennial or short-lived perennial. Start early indoors, grow cool, 50F once fully germinated, and transplant in spring for bloom in summer in northern areas. Add a blaze of brilliance to garden edges, rock gardens and cottage gardens. Trim after bloom for neatness, leaving a few to self sow.
Final Spacing:
1'
Water Requirements:
Medium Water Use
Watering Details:
About 1" per week; do not overwater. May tolerate some drought once established.
Soil pH:
Neutral to alkaline
Fertilizer:
If soil is poor, mix in a few inches of compost prior to planting.
Diseases & Pests:
No major problems.
When to Cut for Bouquets:
Cut when 1/2 of florets are open.
Growing Guides Fall Sowing Hardy Annuals
Access here