Centranthus Ruber Albus Ground Cover
Centranthus Ruber Albus (White Valerian)
Centranthus Ruber Albus (White Valerian) is a delightful free-flowering hardy perennial with slightly fleshy blue-green leaves on upright stems, topped with frothing, sweetly scented, off-white flowers with a pinkish tinge that appear from late Spring to late Autumn.
Incredibly easy to grow, Centranthus Ruber Albus look best grown en-masse on banks, or when allowed to self-seed between the cracks in walls and paving. Very long flowering, these hardy perennial plants form a handsome, bushy mound, with succulent-like, mid-green leaves that contrast perfectly with the vibrant flowers. They are perfect for a wildflower garden, attracting bees and butterflies and other pollinating insects galore. Partner them with other wildflower plants such as Scabious or Nepeta and you can enjoy watching them sway gently in the breeze!
Centranthus Albus ground cover grows best in full sun or partial shade and in any soil that doesn’t become waterlogged in winter. Dead head them after flowering if you want to avoid too much self-seeding.
As a rough guide when planting Centranthus Ruber Albus as ground cover – 4 plants per square metre is adequate with a little patience, 6 will give better coverage, and 9-12 will make a weed supressing carpet very quickly.
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How to grow Centranthus Ruber Albus (White Valerian)
Position: Full sun, partial shade
Soil and site: Well-drained – almost any soil except waterlogged
Flowering time: Late Spring to late Autumn
Growth rate: Moderate
Ultimate height and spread: Height to 75cm, spread to 45cm
Hardiness: Fully hardy once established
Aftercare: In early Spring cut back the previous years’ growth to ground level