Agapanthus coddii aka Codd's Agapanthus

Agapanthus coddii is known as Codd's African lily. It belongs to the Amaryllidaceae family. Its native range lies in South Africa's Waterberg massif, in Limpopo. Kew records it as a geophyte from a subtropical climate. This herbaceous perennial forms clumps and loses its leaves each year. It is not native to Britain or Ireland.

Garden plants reach about 3.3–4.9 feet [1–1.5 metres] tall. Their spread reaches 1.6–3.3 feet [0.5–1 metre]. Plants take two to five years to reach full size. The green leaves have a long, strap-like shape. They measure 0.5–1.5 feet [0.15–0.45 metres] long. Each leaf is about 0.10–0.16 feet [0.03–0.05 metres] wide. Large flower heads carry dark violet-blue buds. These open into blue flowers in late summer. The seedheads add interest through winter and can stay until spring.

Choose a sheltered site in full sun. The soil should hold moisture but drain well. Humus-rich soil suits this plant, including chalk, loam, and sand. It accepts acid, neutral, and alkaline conditions. The RHS gives it a UK hardiness rating of H4. This covers minimum temperatures of about −10 to −5°C. In mild areas, grow it outside with dry winter mulch. In colder areas, use containers with peat-free, loam-based compost. Water freely during growth, then reduce watering in winter. Give a balanced liquid feed each month from spring until flowering.

This plant suits flower beds, borders, and informal gardens. The RHS also lists gravel gardens and prairie-style planting. Other uses include coastal gardens, courtyards, and planting beside walls. Its blooms also make cut flowers. Pruning needs are limited to removing dead flower stems. Leave these until spring to keep the winter seedheads. Raise new plants from seed or divide established clumps. Divide from spring into early summer, or after flowering in early autumn. In frost-prone areas, protect seedlings in a frame through their first winter.

The RHS describes this species as largely free from pests. Slugs, snails, and agapanthus gall midge can still cause trouble. It may also suffer from a virus. The plant is harmful when eaten by people, dogs, or cats. It should not serve as a food plant. Wear gloves and other protective gear when handling it.