This is the very worthy winner of the RHS Chelsea Flower Show Plant of the Centenary, Geranium Rozanne ground cover is a bushy mound forming perennial with masses of beautiful, large (up to 5cm across), saucer-shaped, violet-blue flowers with deeper violet veins and white centres throughout the summer above the mounds of slightly marbled, deep green foliage. Flowering from June to September, these hardy plants are ideal for suppressing weeds at the front of a mixed or herbaceous border and will keep your bees and other pollinators happy for months!
Geranium Rozanne are vigorous plants with a spreading habit and tolerate heat better when in part shade. They make superb ground cover but are incredibly versatile and are equally happy in pots, troughs or trailing over tubs. Perfect for planting in rose gardens and wildflower planting schemes, or in perennial borders in cottage gardens. Try planting in a mixed border with Nepeta, Salvia’s or Lavender.
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Super low maintenance, as a ground cover plant Geranium Rozanne (Cranesbill) will tolerate any soil other than waterlogged areas and will be happy in full sun, partial shade or full shade. In midsummer rejuvenate plants that are beginning to look jaded, by removing old, flowered stems and leaves, and split the clumps in spring if they are getting too large.
As a rough guide when planting Geranium Rozanne 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.
How to grow Geranium Rozanne Position: Full Sun, partial shade
Foliage: Perennial, leaves appear in early Spring with flowers following in late Spring
Soil and site: Fertile and well drained
Flowering time: July to September
Growth rate: Fast
Ultimate height and spread: 60cm and 80cm
Hardiness: Fully hardy once established
Aftercare: Water well until established, avoiding soil becoming waterlogged. Tidy up old stems and leaves to encourage a longer flowering period. Cut back foliage after flowering has finished. Divide congested clumps in early Spring.