Red valerian
Also known as
Spur valerian, Jupiter's beard, Kiss-me-quick, Red spur valerian
Keep this plant’s care guide close at hand.
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Valeriana rubra is an older name historically applied to Centranthus ruber, a long-blooming Mediterranean perennial prized for its clouds of crimson to rose-pink (and sometimes white) flowers. Upright, branching stems rise 45–90 cm from a woody crown, bearing opposite, blue‑green, lanceolate leaves that are often entire and slightly fleshy. In late spring through summer—and in mild climates into autumn—dense, domed cymes of small tubular blossoms attract bees, butterflies, and other pollinators. Adapted to lean, well‑drained, often calcareous soils, it thrives in cracks of stone walls, rocky slopes, and coastal cliffs, tolerating wind and salt spray. The plant self-seeds readily via plume-tufted achenes and can naturalize in suitable sites. Drought-tolerant once established, it excels in hot, sunny exposures and requires minimal care, making it a reliable choice for xeric gardens, cottage borders, and difficult masonry settings. Deadheading prolongs bloom, while allowing some seed ensures gentle colonization. Generally pest- and disease-resistant, it performs best with full sun, sharp drainage, and modest fertility.
Taxonomy
Properties & Requirements
How to care for Red valerian
Water
Water regularly during the first growing season to establish deep roots—about once weekly, allowing the top 3–5 cm of soil to dry between waterings. Once established, it is drought tolerant; in hot, dry periods, water deeply every 10–14 days if there is no rain. Containers dry faster: check twice weekly in summer and water when the top 2–3 cm are dry. Always prioritize drainage; do not let the plant sit in waterlogged soil, especially in winter.
Light
Full sun yields the most compact plants and heaviest bloom—aim for 6–8 hours of direct light daily. It tolerates light afternoon shade in very hot climates, though shade can reduce flowering and increase legginess. South- or west-facing exposures are ideal. Avoid dense shade or heavily overgrown sites. When growing against walls, ensure reflected heat does not combine with poor drainage; offset with mulch and a gritty soil mix.
Nutrients
This species thrives in lean, well-drained soils and typically needs little to no fertilizer. Overfeeding encourages floppy, leafy growth with fewer flowers. In garden beds, mix in a thin layer of compost in early spring or apply a very light dose of a balanced, slow-release fertilizer (e.g., 5-5-5). For container-grown plants, feed at half-strength once in spring and again midseason. Avoid high-nitrogen formulas and never fertilize during peak summer drought or winter dormancy.
Temperature
Hardy in roughly USDA Zones 5–9, this plant tolerates winter lows near −15 °C (5 °F) with good drainage. It prefers mild to warm conditions (15–27 °C) and withstands summer heat if soils are free-draining. Winter wet is more damaging than cold; site on slopes or raised beds in cool, rainy climates. Coastal wind and salt spray are tolerated. In containers, protect roots from deep freezes by clustering pots or moving to a sheltered spot.
