Pocket BotanistPlant guide
Agapanthus.
Agapanthus praecox
Pronounced a-ga-PAN-thus PREY-koks
Also known as African Lily, African-Lily, Bluelily, agapanthus, common agapanthus, lily of the Nile
Agapanthus praecox, commonly known as the African Lily or Lily of the Nile, is a striking perennial plant celebrated for its large, globe-shaped clusters of blue or white flowers atop tall stalks. Native to South Africa, it brings a touch of the exotic to gardens and landscapes with its lush, arching foliage and impressive summer blooms. It's a fantastic choice for adding bold color and architectural interest.
At a glance
- Care level
- Easy
- Plant type
- Perennial flowering plant
- Light
- Full sun to partial shade
- Indoor light
- bright-indirect
- Water
- Every 7 to 14 days
- Mature size
- Grows up to 1 meter tall and 0.5 meters wide
- Growth rate
- medium
- Hardiness
- USDA 8 to 11
- Bloom time
- Mid to late summer
Care
Water regularly during the growing season, allowing the soil to dry slightly between waterings. Reduce watering in the fall and winter. Fertilize during spring and summer for best flowering. Deadhead spent blooms to encourage more flowers and prevent seed formation.
- Watering
- Water thoroughly when the top inch of soil feels dry, reducing frequency in cooler months.
- Feeding
- Feed with a balanced liquid fertilizer every 4 weeks during the growing season (spring to late summer).
- Pruning
- Remove spent flower stalks after blooming to tidy the plant and prevent self-seeding; trim dead or damaged foliage as needed.
- Repotting
- Repot when the plant becomes root-bound, typically every 2-3 years, using a slightly larger pot with fresh, well-draining soil.
- Soil
- Well-draining soil
- Soil pH
- Slightly acidic to neutral
- Temperature
- 5 to 30°C
- Humidity
- 40 to 60%
Safety
- People
- Non-toxic
- Pets
- May cause mild gastrointestinal upset if ingested.
- Edibility
- Ornamental; not intended for consumption.
How to identify it
- Umbel-shaped flower clusters
- Strappy, arching green leaves
- Tall, leafless flower stalks
- Drought-tolerant once established
- Rhizomatous root system
- Height
- 0.6 to 1m
- Spread
- 0.3 to 0.5m
- Leaves
- Green, evergreen
- Flowers
- Blue, Purple, White, 5 to 10cm
Common problems
- Root rot — Caused by overwatering and poor drainage, leading to yellowing leaves and mushy roots.
- Aphids — Small, sap-sucking insects that can infest leaves and flower buds, causing distortion and weakness.
- Slugs and snails — These mollusks can chew holes in leaves and flowers, especially in damp conditions.
Growing it
- Propagation
- Division, Seed
- When to plant
- Spring, Fall
Plant Agapanthus with companions that enjoy similar sun exposure and well-draining soil to create a cohesive and thriving garden display.
Grows well with
- Daylily — Daylilies share similar growing needs for sun and well-draining soil, creating a complementary bloom time and texture.
- Coneflower — Coneflowers provide a contrasting flower form and also attract pollinators, thriving in similar sunny conditions.
- Salvia — Many salvias offer spiky blooms that complement the rounded Agapanthus flower heads and prefer similar sunny spots.
Keep away from
- Poorly Draining Soil — This condition leads to root rot, which is detrimental to Agapanthus health and survival.
- Overwatering — Excessive moisture can suffocate the roots and lead to fungal diseases like root rot.
Similar species
- Agapanthus africanus — Often confused with A. praecox, A. africanus tends to be smaller with more compact flower heads and can be less cold-hardy.
- Agapanthus campanulatus — This species typically has bell-shaped flowers and is known for its relative hardiness, though its flower clusters are often less dense.
Science
- Family
- Amaryllidaceae
- Genus
- Agapanthus
- Order
- Asparagales
- Class
- Liliopsida
- Native range
- South Africa
In its native habitat, Agapanthus praecox thrives in rocky, sheltered areas and often grows in damp ravines or along stream banks.
- Value to wildlife
- nectar source
- Pollinators
- bees, butterflies
- Uses
- Ornamental flowering plant, Cut flowers, Container gardening, Border planting, Mass planting
Through the year
Ecological indicators
- Salinity
- 2/9
- Soil reaction
- 6.5/9
- Light
- 7/9
- Temperature
- 7/9
- Moisture
- 6/9
- Nutrients
- 5/9
Taxonomy resolved against GBIF.
Questions people ask
- How do I get my Agapanthus to bloom?
- Ensure it receives adequate sunlight, water, and nutrients during the growing season, and avoid over-fertilizing with nitrogen.
- Can Agapanthus survive frost?
- Hardier varieties can tolerate light frost, but in colder climates (below zone 8), it's best to provide protection or grow them in containers that can be moved indoors.
- Why are my Agapanthus leaves turning yellow?
- Yellowing leaves can be a sign of overwatering, poor drainage, or sometimes a lack of nutrients.
- How do you divide Agapanthus?
- Divide the rhizomes in early spring or fall by carefully digging them up and separating sections with roots and shoots.
Where the name comes from
The genus name Agapanthus comes from the Greek words 'agape' meaning love and 'anthos' meaning flower. 'Praecox' is Latin for early, referring to its relatively early blooming time in some regions.
Good to know
- The genus name 'Agapanthus' comes from the Greek words 'agape' (love) and 'anthos' (flower).
- Different species and cultivars offer a range of flower colors, from deep blue and vibrant purple to white.
- Agapanthus can be grown in containers and overwintered indoors in colder climates.
- They are rhizomatous, meaning they have fleshy underground stems that store nutrients.
Is your agapanthus looking unwell?
This page is a general guide. Pocket Botanist diagnoses problems from a photo of your actual plant, works out watering for your light and conditions, and reminds you when care is due.
This guide was generated with AI and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.