How to Grow Red Crinum Lily
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Red Crinum Lily
Habranthus robustus
flowerHabranthus robustus is a tender bulbous perennial native to South America, prized for its vibrant red trumpet-shaped flowers that appear after summer rains. This dramatic flowering plant produces graceful, arching blooms on thin stems and attracts hummingbirds and pollinators. It thrives in warm climates and is often grown in containers in cooler regions.
When should you plant Red Crinum Lily in your zone?
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Example Red Crinum Lily timeline · Pittsburgh, PA (Zone 6b)
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Plant Red Crinum Lily
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Red Crinum Lily blooms
Mid-to-late summerBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 9-12; can be grown in containers indoors or overwintered in zones 8 and cooler with protection
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Get my Red Crinum Lily timeline →Growth Stages
Dormancy
2-4 months depending on seasonBulb enters rest period with minimal foliage, especially in winter or dry season
Reduce watering significantly; store in cool, dry location if in containers; protect from hard freezes
Active Growth
4-6 weeksThin, narrow leaves emerge from bulb after adequate moisture and warming
Provide full sun, begin regular watering, apply diluted balanced fertilizer every 3-4 weeks
Bud Formation
2-3 weeksFlower buds appear on thin stems, gradually elongating upward
Maintain consistent moisture during this phase; ensure full sun exposure; avoid overhead watering
Flowering
3-6 weeks total displayBrilliant red trumpet-shaped flowers open, typically in late summer or after rain event; blooms last 1-3 days each but succession of buds extends display
Continue moderate watering; remove spent flowers; provide support if needed; flowers attract hummingbirds
Seed Development & Decline
4-8 weeksAfter flowering, foliage gradually declines as plant shifts energy to bulb storage; seed pods form if pollinated
Taper watering as foliage yellows; do not remove foliage until completely brown; allow bulbs to firm up for dormancy
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water or insecticidal soap; improve air circulation; increase humidity in very dry conditions
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Remove with cotton swab dipped in alcohol; treat with neem oil or insecticidal soap; isolate infected plants
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Remove affected bulbs; ensure good drainage to prevent fungal entry; dust bulbs with sulfur at planting
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and
Remove by hand; use copper barriers; reduce overwatering which encourages them
Uses
No culinary use
CulinaryHabranthus robustus is toxic and not suitable for consumption; it is grown purely as an ornamental. [source]
Ornamental cut flowers
HouseholdThe striking red trumpet flowers can be used in fresh floral arrangements, though they are short-lived. They are especially valued for adding drama to tropical or exotic-themed indoor displays. [source]
Hummingbird and pollinator magnet
WildlifeThe bright red flowers are highly attractive to hummingbirds and native pollinators, making this plant an excellent choice for wildlife gardens. Its tubular flowers are specifically adapted to hummingbird pollination. [source]
Exotic garden specimen
CraftHabranthus robustus is prized by succulent and tropical plant enthusiasts for its unusual growth pattern and showy flowers. It is excellent for container gardens, xeriscaping, and show gardens. [source]
Harvest Tips
Flowers bloom naturally and do not require harvesting; if desired for cut flowers, cut stems in early morning when buds are just opening. Flowers last only 1-3 days in water. Collect seeds from mature pods after flowering and allow to dry; sow fresh seeds on moist soil in spring. Allow bulbs to multiply naturally in ground or divide bulb offsets every 3-4 years in spring.
Fun Facts
- 🌱 Habranthus robustus is often called the 'rain lily' because its flowers are triggered by moisture after dry periods, mimicking the plant's native South American habitat where it depends on summer rains for blooming cues.
- 🌱 The flowers are remarkably short-lived—each bloom lasts only 1-3 days—but the plant produces successive flowers over several weeks, creating an extended flowering display.
- 🌱 This species is closely related to Amaryllis and Hippeastrum and shares their elegant trumpet flower form; it is sometimes used in hybridization programs to create new ornamental varieties.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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