Pronounced: KLEM-uh-tiss al-PEEN-uh
Sunset zones: All (Western).
USDA zones: 6-9.
Height: 6-10 feet (2-3 m). Width: 5 feet (1.5 m).
Spring to early summer.
Single, bell-shaped, blue flowers with white centers.
Deciduous, green leaves.
Tops in full sun to partial shade, feet in shade.
Fertile, humus rich, well-drained soil.
Mulch well with composted manure or compost. Fertilize once a month with a complete organic fertilizer during the growing season.
Sow seed and keep at 65-75°F (18-23°C); germination should occur rapidly. If germination has not occurred within 4 weeks, place seed trays where temperatures are 25-40°F (-3 to 4°C) for up to 4 weeks.
Layer branches in late winter.
Basal and softwood cuttings in spring.
Division in spring.
Semi-ripe cuttings in early summer.
Pruning group 1 or A.
Rainy Side Notes
Clematis alpina discovered in 1768, is a beautiful true-blue color and blooms about the same time as C. montana, although not as exuberantly. C alpina had an Award of Merit bestowed upon it in 1993, by the Royal Horticultural Society.
In my garden, it climbs up a stump, falls down, gets trampled on and still manages to flourish. It weaves in and out of Salal and a climbing Aster, giving the spring garden a breath of blue. Occasionally it will flower again in autumn.
Photographed in author's garden.