<<

222 N Havana Spokane WA 99202 (509) 477-2181 http://ext100.wsu.edu/Spokane [email protected]

C120 ROCK GARDEN AND EDGING PERENNIALS

These are often used as edging of bulb beds and rock gardens

Name Bloom Culture Habit & Use Propagation Season Color Seed. Softwood cuttings after bloom. Arabis caucasica White, lilac, Full sun. Well-drained 12 inch spreading . Rock March - May Gardens. Edging . Prune Division in spring and fall. Rock Cress lilac pink neutral to alkaline soil. back after flowering. 3-4" tall flower. Spaces up to 12". Armeria maritima Pink or Full sun. Dry, infertile Seed. Follow package label. Clump May - June Edging for rock garden. Cut Sea Thrift white soil. division in spring. flowers. Blue to Sun or partial shade. Anemone pulsatilla reddish April - May Well-drained, neutral 10-12" tall. Rock garden. Border. Seed. Division in the spring. Windflowers purple, to alkaline soil. white

Aubrieta deltoidea Rose lilac to Full sun. Well-drained 6" prostrate habit. Rock garden Seed. Cuttings after flowering. Division April - May Rock cress purple soil. edges. Trim after flowering. in spring.

Yellow, 9-12" prostrate. Rock garden Full sun. Seed. Division in spring. Cuttings in Aurina saxatilis lemon edging. Cut back half way after April - May Well-drained, dry soil June. Basket of Gold yellow, gray bloom. best. foliage. Division in spring. Softwood Seed, small plants at local nurseries Bellis perennis Red, white, Sun to light shade. April - June cuttings in June. Seed sown in cold early spring. English Daisy pink Cool, rich soil. frame in August. Erysimum asperum Yellow or Well-drained soil. 1-2 feet. Border, For biennial use, sow seed outside in April - May Full sun or light shade. Siberian Wallflowe orange rock garden. Use with bulbs. late summer, or indoors.

Extension programs and policies are consistent with federal and state laws and regulations on nondiscrimination regarding race, sex, religion, age, color, creed, national or ethnic origin; physical, mental, or sensory disability; marital status, sexual orientation, or status as a Vietnam-era or disabled veteran. Evidence of noncompliance may be reported through your local Extension office.

C120 – Rock Garden Edging Perennials Name Bloom Flower Culture Habit & Use Propagation Season Color Full sun. Well-drained White, soil. Light covering of Iberis sempervirens 6-12" tall. Rock gardens and Cuttings in mid-summer. Division in April - May glossy green evergreen branches to Candytuft edging spring or fall. leaves reduce sunburn in winter. Red, Sun. Well-drained 3-6" prostrate. Edgings. Rock Phlox subulata magenta Layering or division after flowers March - May soil, slightly alkaline. gardens. Ground cover. rose, pink, bloom. Late fall cuttings in coldframe. Moss pink lilac, white Saponaria ocymoides Full sun. Well-drained 3-6" prostrate. Edgings. Rock Late Seed. Division in the spring. Cuttings Soapwort Deep pink soil. gardens. Ground covers. May - June mid-summer.

Cuttings with single rosette after Saxifraga spp. Pink, white, Partial shade. Moist, 3-12" clumps. Rock gardens. June - July flowering. Seed. Saxifrage yellow well-drained soil.

Dwarf prostrate. Rock garden. Dry Sedum spp. White, Full sun. Cuttings in spring. varies walls. Stone Crop yellow, pink Well-drained, dry soil.

Mid-summer Varies Full sun. Good Sempervivum 3-4" tall. Rock garden. Dry walls. Grown for Many drainage. Poor, rocky tectorum Edging. Containers. Separate small outer rosettes and plant. foliage. . soil is best. Hens and Chicks

P a g e | 2 9/3/2015