How to Grow Colchicum 'Waterlily'
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Colchicum 'Waterlily'
Colchicum autumnale 'Waterlily'
flowerColchicum 'Waterlily' is a stunning autumn-blooming bulb featuring double flowers with layered petals resembling waterlilies in shades of mauve-pink to lilac. This ornamental perennial blooms in fall when most gardens are fading, providing unexpected color and interest. Despite its delicate appearance, it is a hardy and reliable perennial that returns year after year.
When should you plant Colchicum 'Waterlily' in your zone?
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Example Colchicum 'Waterlily' timeline · Pittsburgh, PA (Zone 6b)
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Plant Colchicum 'Waterlily'
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 Colchicum 'Waterlily' blooms
Around Apr 23≈ 6 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Colchicum 'Waterlily' dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 4-8; requires cold winter dormancy for best performance
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Dormancy
January-AugustBulbs lie dormant underground during winter and spring, having depleted energy reserves after flowering
No watering needed; bulbs require cold period for flowering triggers. Protect from rodents that may eat bulbs.
Summer Rest
June-AugustFoliage dies back completely by mid-summer; bulbs are inactive and drying out
Keep soil dry; do not water. Allow area to rest undisturbed. Mark location to avoid accidental disturbance.
Flowering
September-OctoberFlowers emerge directly from soil without accompanying foliage, producing double mauve-pink blossoms with 12-20 layered petals resembling water lilies
Protect from heavy rain and strong winds. Flowers last 1-2 weeks. Light staking may help in exposed areas. Do not remove flowers prematurely.
Foliage Growth
October-MayAfter flowering, grass-like green foliage emerges from the base of spent flowers, growing 6-8 inches tall
Water moderately; foliage gathers energy for next year's blooms. Do not cut back until foliage yellows naturally. Feed lightly with low-nitrogen fertilizer.
Spring Maturation
March-JuneFoliage continues to mature and gather nutrients; leaf area expands as temperatures warm
Continue watering until foliage begins to yellow. Allow foliage to die back naturally for best bloom next year.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Use wire mesh baskets around planted bulbs; protect with chicken wire cloches during dormancy; consider rodent repellents
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Remove debris where they hide; use copper barriers or organic slug pellets; encourage natural predators
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Increase humidity; spray with water; use insecticidal soap if severe
Uses
Poisonous - Not for consumption
CulinaryAll parts of Colchicum contain colchicine alkaloids and are extremely toxic if ingested. Never consume any part of the plant or use for medicinal purposes without expert medical supervision. [source]
Traditional medicine compound (historical, dangerous)
MedicinalHistorically, colchicine extracted from Colchicum has been used medically for gout treatment under strict pharmaceutical control. Modern medical-grade colchicine is synthesized; never attempt home extraction as the plant is dangerously toxic. [source]
Autumn garden ornamental
HouseholdColchicum 'Waterlily' is prized for its unexpected fall color in garden borders, rock gardens, and containers, blooming when few other flowers are present. Its unique double flowers and delicate appearance make it a showstopper in late-season garden designs. [source]
Floral arrangements and cut flowers
CraftThe exotic double flowers can be used in short-lived fresh flower arrangements for autumn events and displays, offering unique texture and color uncommon in fall bouquets. [source]
Pollinator support
WildlifeColchicum flowers provide nectar and pollen for bees and other pollinators in autumn when food sources are scarce, supporting beneficial insects before winter. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Colchicum is an ornamental flower not harvested for cutting, though individual flowers can be gently removed for arrangements. Pick flowers in early morning after they open fully. They last 3-5 days in a vase with fresh water. Never cut foliage until it yellows naturally in late spring, as the plant needs it to recharge for next year's blooms.
Fun Facts
- 🌱 Colchicum flowers famously bloom 'backwards' — flowers appear in fall before foliage emerges in spring, and foliage appears after flowering, requiring a special growth cycle adaptation.
- 🌱 The double 'Waterlily' form is a cultivated variety that produces sterile flowers, making plants long-lived in gardens without self-seeding.
- 🌱 Colchicum is extremely toxic due to colchicine alkaloids; even skin contact with the bulb can cause irritation, so always wear gloves when handling.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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