Armand clematis in April: monthly care

Armand clematis thrives in full sun or partial shade, ideally with its roots in cool shade and its head in the light. Choose a sheltered spot away from cold winds, as this evergreen climber sits right on the edge of hardiness in zone 7. A south- or west-facing wall offers the best protection and warmth. The soil should be loam or clay-based, moisture-retentive but well-drained; clematis dislike waterlogged roots. Before planting, dig a hole roughly 45 cm wide and deep, and work in plenty of organic matter such as garden compost or well-rotted manure to improve structure and fertility. Plant in March, April, September, or October when the soil is workable and temperatures are mild. Set the rootball about 8–10 cm deeper than it sat in the pot; this encourages new shoots to develop from below ground and helps the plant recover if clematis wilt strikes. Space plants 100 cm apart if planting more than one. Position the plant at a slight angle leaning toward its support—sturdy trellis, wires, or a pergola—so stems can climb naturally. Clematis armandii can reach 3–7 metres, so ensure your structure is robust. After planting, water thoroughly to settle the soil around the roots. Apply a 5–8 cm layer of mulch (compost, bark, or gravel) around the base, keeping it clear of the stems, to keep roots cool and retain moisture. Tie in the main stems loosely to guide early growth. Water regularly through the first growing season until the plant is established, especially during dry spells.

Water regularly during the growing season, especially in dry spells, as Armand clematis has moderate water needs and dislikes drought. In spring and summer, water deeply once or twice a week if rainfall is scarce, directing water at the root zone rather than the foliage. Reduce watering in autumn and winter, but don't let the soil dry out completely, particularly in the first couple of years. Evergreen foliage continues to lose moisture even in winter, so check plants during prolonged dry or frosty periods. Feed in March and again in June. In early spring, apply a general-purpose granular fertiliser (such as blood, fish and bone or Growmore) around the base, then mulch with compost or well-rotted manure to lock in moisture and add slow-release nutrients. The June feed—a liquid tomato fertiliser is ideal—supports flowering and helps ripen new growth. Avoid high-nitrogen feeds after midsummer, as soft late growth is vulnerable to frost. Clematis armandii is borderline hardy in zone 7, so winter protection may be needed in cold gardens. Mulch the root zone thickly in late autumn, and consider wrapping young plants or the base in fleece during severe cold snaps. Established plants are tougher but can suffer leaf scorch in harsh winters; damaged foliage usually recovers in spring. Watch for clematis wilt, a fungal disease that causes stems to collapse suddenly. Planting deeply helps, as new shoots can emerge from below ground. Aphids and slugs occasionally trouble young growth in spring. Evergreen leaves may look tatty by late winter; resist the urge to tidy before May, as early pruning removes flower buds.