A very unusual plumbago species that we love for its clouds of sky blue flowers on long wand-like stems in autumn. A rounded bushy plant that usually starts from the base each spring. Over summer it develops into a rounded plant. By late summer long thread like wands push up to 14″ long and erupt in clusters of sky blue flowers. The display is light and flowery and it makes a fantastic compatriot with fall asters and and mums. Very easy to grow late blooming perennial from SW China. This does not spread like the much more common Ceratostigma plumbaginoides… instead it forms a distinct shrublike plant unto its own. The luminous flowers have intricately patterned petals which are conspicuous. To 22″ tall and about 1/2 as wide. Rich to average soil that is never boggy. Mulch in November in very cold gardens. Otherwise we’ve not lost it to cold. Great in autumn bouquets. The long stemmed flowers last well in a vase. A welcome color, texture, and height for the autumn garden. Even visited by hummingbirds. Leaves often turn bright red in winter following bloom. Full sun to very light shade. Light summer water- tolerates heat and drought when established. Blooms better in the autumn with deep infrequent soaks if fall rains stall.
Genus: Ceratostigma
Ceratostigma willmottianum ‘Xera Sky’
A cool sub shrub that covers itself for months in dime sized sky blue flowers. The intensity of the color is hard to capture- it must be experienced. Forms a rounded wiry shrub with diamond shaped wavy small green leaves. To 2′ x 2′ in a season. Full sun, and rich, well drained soil with regular summer water. Freezes to the ground below about 15ºF- re-sprouts form the base in spring. Great in containers. The better the drainage the hardier this extraordinary plant will be. Provide a warm position and mulch in autumn. Once it has been established through a winter it is a fairly permanent plant. Some deer resistance. Do not cut back until you see new growth in spring- then remove all damaged stems. Great in hot sunny borders. Regular summer water.
Xera Plants Introduction
Ceratostigma willmottianum ‘Palmgold’
Striking gold leaved perennial that pairs bright blue flowers for a bold effect. Blooms from late July to October on a spreading, sprawling plant. Freezes to the ground in most winters and returns from the base if in rich, well drained soil in full sun. Excellent perennial in containers. To 1′ tall by 2 wide in a season. Regular summer water. Foliage does not burn in sun. Mulch in autumn. Do not cut back until you see new growth in spring. Then remove winter killed stems. Hardier to cold in rich, very well drained soil. Often overwinters in containers. Striking perennial for contrast, brilliance. AKA Chinese Plumbago.