Agapanthus Albidus – 3 litre pot

Description

Agapanthus Albidus – white African lily

Botanical name: Agapanthus albidus (white-flowered African lily)
Common names: White African lily, white agapanthus
Family: Amaryllidaceae
Plant type: Evergreen perennial with fleshy, rhizomatous roots
Habit: Clump-forming, upright
Pot size: 3 litre pot
Eventual size: Approx. 0.6–1m tall in flower × 0.5–0.6m spread, reaching full size in about 3 years
Foliage: Strap-shaped, arching green leaves; evergreen in mild areas
Flowers: Rounded umbels of white trumpet-shaped flowers on tall stems, mid to late summer into early autumn (July–September)
Scent: Not scented
Aspect / light: Full sun to partial shade; best in full sun
Soil: Fertile, moist but well-drained; pH about 6.5–7.5 (neutral, tolerating slightly acid to slightly alkaline)
Hardiness: RHS H3 (half-hardy); USDA zones 8–11; tolerates roughly 1°C to −5°C
Exposure: Sheltered; good for coastal gardens; protect from cold, drying winds
Native range: South Africa (Western Cape)
Toxicity / pet & child safety: Harmful if eaten; the sap can irritate skin, eyes and mouth. Considered toxic to cats and dogs if eaten. Wear gloves when dividing, and site away from where children or pets might chew it.

Agapanthus albidus is the white-flowered form of the African lily, prized for its bold, rounded heads of pure white trumpet flowers held on tall, elegant stems above arching strap-shaped foliage through mid to late summer. Easy-going, drought-tolerant once established and long-flowering, it brings a cool, architectural touch to sunny borders, gravel gardens, coastal plantings and patio pots, and makes a superb, long-lasting cut flower.

GardenAdvice notes

A clump-forming, evergreen perennial from the Western Cape of South Africa, Agapanthus albidus grows from fleshy, rhizomatous roots rather than a true bulb. It is grown for its dramatic summer flower heads and its tolerance of hot, dry, sunny positions, making it one of the most reliable plants for late-season colour in a well-drained border or container.

Growing & planting

Plant in spring in fertile, well-drained soil in full sun for the best flowering, ideally in a spot sheltered from cold, drying winds. Improve heavy or poor soil by working in compost or grit to aid drainage, as sitting wet — especially over winter — is the main cause of failure. Space plants about 0.5m apart. In colder gardens, growing in a container is often the best approach, as pots can be moved to a sheltered spot or under cover for winter.

Care & maintenance

Water regularly through the growing season, keeping plants a little drier over winter. From late spring, a high-potash feed (tomato feed works well) every couple of weeks encourages flowers rather than leaf. Deadhead spent blooms and remove any tatty foliage to keep plants tidy. In cold areas, protect the crown over winter with a dry mulch, or move container-grown plants into a frost-free greenhouse or porch. Container plants flower best when slightly pot-bound, so only pot on every few years.

Propagation

Agapanthus is most reliably increased by division or offsets; seed is possible but slower and named forms may not come true.

• Division: Lift and divide congested clumps in spring, separating the fleshy crowns with a spade or knife and replanting straight away in well-drained soil. Divide only every four to six years, as plants flower best when a little congested.
• Offsets: Remove naturally produced offsets from around the base in spring and pot them on individually until established.
• Seed: Sow fresh seed in a well-drained mix in warmth. Seed-raised plants are variable and typically take two to three years to reach flowering size.

Pests & diseases

Generally trouble-free. The main pest to watch for in the UK is agapanthus gall midge, whose larvae cause flower buds to become discoloured, deformed and fail to open — remove and destroy any affected buds promptly. Slugs and snails may graze soft new growth in spring, and aphids can occasionally cluster on flower stems. In poorly drained soil, fleshy roots are prone to rot, so good drainage is the best prevention.

Uses in the garden

Superb in sunny borders, gravel and Mediterranean-style plantings, and coastal gardens, and excellent in patio containers where its shape can be shown off. The long-lasting flowers are ideal for cutting, with an excellent vase life.

Wildlife value

The nectar-rich summer flowers are attractive to bees and other pollinating insects, adding useful late-season forage to a sunny garden.

Toxicity & safety

Agapanthus is harmful if eaten, and the sap can irritate skin, eyes and mouth, so wear gloves when dividing or handling the roots. It is also considered toxic to cats and dogs if eaten. Site it away from spots where children or pets are likely to chew the foliage.

GardenAdvice tip

Don’t be tempted to give agapanthus too much room or divide it too often — a slightly congested clump gives far more flower than a freshly split one, so patience is rewarded. In colder gardens, keep it in a pot you can move somewhere sheltered over winter, and switch to a high-potash feed in early summer if you’re getting plenty of leaf but few flowers.

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