Evergreen Clematis

Clematis armandii is native to central and western China, where it grows in montane forests, scrub, and along stream banks at elevations of 600–3,000 m in the provinces of Sichuan, Yunnan, Guizhou, Hubei, and Gansu.

• Named in honor of Père Armand David (1826–1900), the French Catholic missionary and naturalist who discovered many important Chinese plant species, including the giant panda and the dove tree (Davidia involucrata)
• Introduced to Western horticulture in 1900 by the renowned plant collector Ernest "Chinese" Wilson, who sent seeds to the Veitch Nurseries in England
• The Veitch nursery firm exhibited the first flowering specimen in 1909, where it caused a sensation
• Has been a staple of Mediterranean-climate and mild-climate gardens ever since
• The cultivar "Apple Blossom" is the most widely grown form, valued for its pink buds and almond fragrance
• The cultivar "Snowdrift" has pure white flowers
• In China, Clematis species have been used in traditional medicine for centuries, primarily as diuretics and anti-inflammatory agents
• One of the most popular clematis in the UK, France, and the US Pacific Northwest, where the mild climate suits its evergreen nature

Evergreen Clematis is a vigorous evergreen woody vine climbing by twining leaf petioles to heights of 5–8 m or more, creating dense coverage of walls, fences, and pergolas.

Stems: Woody, ribbed, dark reddish-brown, slender but tough, climbing by twining leaf petioles. New growth is striking — emerges bronze-red before maturing to dark green.

Leaves: The most distinctive clematis foliage — large, leathery, lanceolate to oblong-lanceolate, 10–20 cm long and 3–7 cm wide, with entire (smooth) margins or occasionally 1–2 small lobes. Leaves are dark glossy green above, paler beneath, with 3 prominent parallel veins. New leaves emerge bronze-red. The leathery texture allows the leaves to persist year-round in mild climates. Leaves are arranged in flat, overlapping sprays along the stems, creating dense coverage.

Flowers: Produced in profuse axillary panicles from the previous year's growth. Individual flowers are 5–6 cm across with 4–6 broad, overlapping white sepals (no true petals). Stamens are numerous with prominent creamy-yellow anthers. Flowers are strongly and sweetly fragrant — the scent of "Apple Blossom" resembles sweet almonds or hawthorn. Blooms in early spring (March–April), often the first clematis to flower.

Fruit: Clusters of achenes with long, feathery, silky styles forming attractive fluffy seedheads.

TOXIC: All parts contain protoanemonin — can cause skin irritation and is toxic if ingested. Wear gloves when handling or pruning.

Evergreen Clematis grows naturally in the moist, temperate montane forests of central and western China, where it scrambles through the understory and climbs into the canopy of mountain trees.

• Thrives in a position with its roots in cool, moist shade and its top growth in sun — the classic clematis preference
• Needs some protection from cold, drying winds — the evergreen leaves are vulnerable to windburn in exposed sites
• Best in mild, maritime climates — ideal for the Pacific Northwest, UK, western France, and similar regions
• The large, leathery evergreen leaves provide year-round privacy and wall coverage
• In cold winters (below -12°C), the leaves may be damaged or partially deciduous, but the vine recovers
• Flowers are pollinated by early-emerging bees and flies attracted to the nectar and sweet fragrance
• Resistant to deer and rabbit browsing due to the toxic compounds
• Can be damaged by clematis wilt but is generally more resistant than large-flowered hybrid clematis
• Useful as a screen, wall cover, or for clothing large pergolas with year-round green foliage

Evergreen Clematis requires a permanent site with sturdy support and benefits from a sheltered position.

Site Selection: Full sun to partial shade for the top growth, with shade at the root zone. Plant against a sheltered wall (south- or west-facing in cool climates). Avoid exposed, windy sites that can damage the evergreen foliage.

Soil: Fertile, moist but well-drained, neutral to slightly alkaline (pH 6.5–7.5). Dig in plenty of organic matter. Must be well-drained — this clematis will not tolerate waterlogged winter soil.

Planting: Plant in spring or early fall. Bury the crown 5–8 cm below soil level. Space 2–3 m apart. Mulch heavily to keep roots cool and moist.

Watering: Keep soil consistently moist during the growing season. Reduce watering in winter. Mulch annually.

Pruning: Pruning Group 1 — flowers on old wood. Minimal pruning required. Remove dead or damaged stems after flowering. Do not prune in winter or you'll lose the spring flowers. Can be cut back hard to rejuvenate old, overgrown plants, but flowering will be reduced for a year.

Training: Guide young shoots toward the support. Leaf petioles will twine around thin supports, wires, or trellis mesh.

Hardiness: USDA Zones 7–9. Evergreen to about -10°C. Below that, leaves may burn or drop but roots survive to Zone 6.

Propagation: By semi-hardwood cuttings in summer, layering, or seed.