Centranthus ruber, commonly called red valerian or Jupiter’s beard, is a well-branched, bushy, clump-forming, woody-based perennial which is valued for its ability to produce, often in poor soils, a showy bloom of star-shaped crimson, pink or white flowers from spring to frost.
Although native to the Mediterranean, this plant has escaped gardens and naturalized in certain parts of the United States, particularly along the west coast.
Flowers appear in dense terminal clusters (cymes) atop upright to relaxed stems rising above the foliage to 40-80cm tall. Flowers are fragrant. If not deadheaded, flowers give way to dandelion-like seed heads which are typically disbursed around the landscape by wind. Fleshy, sessile, oval to lanceolate leaves (to 10 cm long) are gray-green.
Ideal fro cottage gardens, naturalized areas, stone walls, slope or bank cover to help combat erosion, borders, particularly as specimens or in small groups where planting can be more easily managed. Effective ground cover.
Easily grown in average to sandy, medium moisture, well-drained soils in full sun to part shade. Prefers slightly alkaline soils in full sun. Limestone may be added to acidic soils. Tolerates dry soils. Does well in poor, infertile soils where it usually grows in a more compact form. Freely self-seeds in optimum growing conditions to the point of being somewhat invasive and weedy. Promptly remove (shear if large planting) spent flower stems to encourage additional bloom and to prevent seeds from forming.
Information source: http://www.missouribotanicalgarden.org/
Approximately 40 seeds in 0.1g packet.
Genus - Centranthus
Species - Ruber
Variety - mix
Common name - Valerian
Pre-Treatment - Not-required
Hardiness zones - 5 - 8
Height - 0,80 m
Spread - 0,40 m
Plant type - Perennial flower
Exposure - Full Sun, Partial Sun, Partial Shade
Growth rate - Medium
Soil PH - Neutral, alkaline
Soil type - Average to Sandy, well drained
Water requirements - Average
Landscape uses - Cottage gardens. Naturalized areas. Stone walls. Slope or bank cover to help combat erosion. Borders, particularly as specimens or in small groups where planting can be more easily managed. Effective ground cover.
Bloom season - May - August
Leaf / Flower color - Green / Pale red, white
Seeds can be sown outside after the last frosts till the end of summer. Ideal temperature for germination - +20C. If temperature is lower, germination process will be slow and irregular.
Sow into prepared beds filled with good compost. Cover the seeds lightly.
Seeds can be started indoors 10-12 weeks before the date of the last killing frost of spring. Maintain a temperature of +18-+20C within the growing medium.
Germination will take 21-25 days.
After germination - keep in cooler conditions.
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