Lily of the Nile (Agapanthus praecox)

Lily of the Nile

Agapanthus praecox

Its spherical blue blooms glow like summer constellations atop tall stems. Clumping herbaceous perennial; common names: Lily of the Nile, African Lily.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Thrives in full sun for optimal blooming; tolerates partial shade in hot, arid regions to prevent leaf scorch
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Watering Water deeply when the top 5 cm of soil dries out; avoid waterlogging to prevent root rot
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Temperature Hardy to -5°C with winter mulch protection; prefers 15–25°C during active growing season
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Characteristics

  • Leaf: Long, strap-shaped evergreen leaves, glossy deep green, arranged in dense basal clumps
  • Flower: Dense spherical umbels of funnel-shaped blue, white, or pale purple blooms on stiff, upright scapes
  • Stem: Smooth, rigid flowering scapes rising 0.9–1.5 m above foliage clumps
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Care Guide

Watering

Keep soil consistently moist during active growth and blooming

Fertilization

Apply balanced liquid fertilizer monthly. Discontinue fertilization after flowering to support dormancy preparation

Banana peel compost tea:Compost banana peels for 2–3 weeks, steep in water for 24 hours, dilute 1:20 for root drench to avoid nutrient burn
Pruning
  • Deadhead spent flower heads promptly to encourage extended blooming
  • Trim browned leaf tips to maintain a tidy clump appearance
  • Cut back faded flowering scapes to ground level after blooming completes
  • Remove dead or damaged foliage in early spring to promote new growth
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion may cause vomiting, diarrhea, abdominal pain, and lethargy

Humans: Contains saponicins; ingestion may cause oral irritation, nausea, or vomiting in large quantities

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Garden Uses & Culture

Culture: Symbolizes love, fertility, and enduring beauty in South African cultural traditions

Usage: Ornamental garden border plant, cut flower for floral arrangements, container specimen for patios