How to Grow Red Spider Lily
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Red Spider Lily
Zephyranthes carinata
flowerRed Spider Lily is a tender bulbous perennial prized for its delicate, spider-like red flowers that bloom prolifically after summer rains. Native to Mexico and Central America, it produces slender, grass-like foliage and produces flowers on tall, leafless stems. The blooms are short-lived but appear in abundance, creating a spectacular floral display.
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Example Red Spider Lily timeline · Pittsburgh, PA (Zone 6b)
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Plant Red Spider 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 Spider Lily blooms
Around Aug 15≈ 120 days after planting
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 9-11; in cooler zones (7-8), grow in containers and bring indoors during winter
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Dormancy
December-February (cooler zones) or variable in tropicsBulbs are resting, with minimal growth above ground; foliage may be completely absent or minimal
Store dry bulbs in cool, dark location (50-60°F). Water sparingly or not at all. Allow 2-3 months rest period annually.
Sprouting & Foliage Growth
3-4 weeksThin, grass-like green leaves emerge from the bulb and elongate; no flowers yet
Begin regular watering as growth resumes. Apply balanced fertilizer monthly. Ensure full sun exposure for strong foliage development.
Pre-flowering
2-3 weeksTall, leafless flower stems (scapes) begin to elongate; flower buds form at the tip of each scape
Maintain consistent moisture without waterlogging. Reduce nitrogen fertilizer; switch to phosphorus-rich formulation to encourage flowering.
Flowering
2-4 weeks per flush; multiple flushes possibleSpectacular red, pink, or occasionally white flowers with 6 petals and prominent red stamens open on tall stems; flowers are 1-2 inches across with a distinctive spider-like appearance
Maintain moderate moisture. Deadhead spent flowers to encourage continuous blooming. Reduce or stop watering temporarily between bloom cycles to trigger successive flushes.
Post-flowering & Bulb Development
4-6 weeksFlowers fade and fall; plant energy is redirected to foliage and bulb enlargement; seed pods may form if not deadheaded
Continue regular watering and monthly balanced fertilizer to support bulb storage reserves. Allow foliage to die back naturally in fall (zones 7-8) for dormancy preparation.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water or miticide; ensure adequate humidity and airflow
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Treat with insecticidal soap or neem oil; inspect bulbs before planting
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Remove manually or treat with horticultural oil spray
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Dust bulbs with diatomaceous earth at planting; avoid overhead watering which attracts flies
Uses
Not for consumption
CulinaryZephyranthes carinata bulbs contain lycorine and other alkaloids and are toxic if ingested. The plant is grown exclusively for ornamental purposes. [source]
Traditional Asian medicine
MedicinalSome Asian traditional medicine systems historically used Zephyranthes species in remedies, though scientific evidence is limited. Modern use is primarily ornamental due to toxicity concerns. [source]
Cut flower arrangements
HouseholdThe delicate red flowers are prized for fresh floral arrangements and bouquets, lasting 1-2 days in water. Their unique spider-like form adds exotic interest to arrangements. [source]
Pollinator attraction
WildlifeThe bright red flowers attract hummingbirds, butterflies, and other pollinators, making Zephyranthes carinata valuable for wildlife gardens and pollinator conservation. [source]
Garden ornament & landscape design
CraftGrown as an ornamental bulb in gardens, containers, and borders for its striking red flowers and tropical appeal. Naturalizes well in warm climates and creates stunning mass plantings. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Red Spider Lilies are ornamental flowers best enjoyed in the garden or cut for fresh arrangements. Cut flower stems at the base in early morning when buds are just opening. Flowers last 1-2 days in a vase. Allow some flowers to remain on the plant for visual impact and potential seed development. For bulb division and propagation, lift bulbs in fall (after foliage dies back in cooler zones) or every 3-4 years when clumps become crowded.
Fun Facts
- 🌱 The common name 'Spider Lily' derives from the flower's distinctive appearance—the 6 petals and long, prominent stamens resemble a spider's legs and body.
- 🌱 Zephyranthes carinata is often called a 'rain lily' or 'rain flower' because blooming is reliably triggered by heavy rainfall after a dry period, making it a natural rain indicator in tropical gardens.
- 🌱 In zones 7-8, these bulbs can be grown as summer-blooming container plants and overwintered indoors; bulbs must remain completely dormant and dry during winter rest to survive and rebloom the following year.
Gardening Terms
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