Siberian Wallflower is a hardy biennial that defies its demure name with clusters of vibrant orange, phlox-like blossoms that command attention from early summer through autumn. Despite being technically a biennial, it typically flowers in its first year, rewarding patient gardeners with months of color. Growing 10 to 18 inches tall with narrow green foliage, this heirloom thrives in zones 4 through 4 and reaches full maturity in approximately 100 days. It handles drought once established and attracts pollinators, making it both beautiful and ecologically generous.
10
Full Sun
Moderate
4-4
18in H x 12in W
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Moderate
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The Siberian Wallflower glows with vibrant orange clusters of phlox-like flowers that bloom generously from early summer into autumn, often in its first year despite being technically a biennial. Its narrow green foliage creates an elegant backdrop for the radiant blossoms, while its moderate water needs and drought tolerance once established make it forgiving for gardeners who sometimes forget to water. At 10 to 18 inches tall, it fits neatly into borders and containers without overwhelming nearby plants, and it attracts pollinators throughout its long blooming season.
Siberian Wallflower is primarily grown as an ornamental flower for garden borders and beds, where its vibrant orange clusters brighten spaces from spring through late summer. Its compact height and generous bloom time suit it well for cutting gardens, while its ability to thrive in well-drained sites makes it valuable for rock gardens and raised beds.
No timeline data available yet for this variety.
Sow seeds indoors in pots 10 to 12 weeks before your last spring frost, covering them lightly with about 1/8 inch of soil. Seedlings will emerge in 10 to 14 days. Grow them cool at 55 to 70 degrees Fahrenheit and pinch them back to encourage bushier plants before transplanting after the last frost.
Transplant seedlings outdoors after your last frost date into well-drained soil spaced 10 inches apart. Harden off seedlings by gradually exposing them to outdoor conditions over several days before final planting.
In warm winter areas (zones 8 and 9), direct sow seeds in fall for winter growth and spring blooms.
Pinch back young seedlings before transplanting to encourage bushier, more floriferous growth. Deadhead spent flower clusters throughout the growing season to extend blooming into late summer and autumn.
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