Agapanthus (African Lily) Care: Growing Blue Blooms in Gardens & Pots

Agapanthus, the African lily or lily of the Nile, is a South African perennial prized for its summer globes of blue, violet, or white trumpet-shaped flowers atop strappy foliage. Hardy in zones 8–11, it’s grown in containers in colder regions and overwintered indoors.

Planting

• Timing: Spring in cold climates; fall in mild areas.
• Soil: Fertile, moist, well-drained. Amend heavy soil with compost, peat, manure.
• Containers: 12-inch+ pots with drainage holes; quality potting mix.
• Depth/Spacing: Plant rhizomes 2″ deep, 4″ wide, 6″ apart.

Watering

Water deeply after planting. Keep consistently moist during establishment. Established plants need regular water in spring/summer; reduce in fall/winter. Pots dry faster—monitor daily in heat.

Pre-Bloom Care

• Spring: Remove old foliage; mulch with compost.
• Feed with organic fertilizer for larger blooms.

Winter Protection

• Zones 8+: Mulch heavily.
• Colder zones: Dig rhizomes after frost; divide clumps; store in cardboard box with newspaper in cool (35–45°F), dark place until spring.
• Pots: Move to unheated garage/basement; water sparingly.

Uses

Cut flowers last well in arrangements. Mass plantings create dramatic blue drifts.