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PlantSnap
Plant Care
Three-cornered leek
(Allium triquetrum)
Also Known As
Three-cornered leek, Triangular leek, Wild garlic, Ramp
About This Plant
Allium triquetrum is a perennial bulbous plant species in the Amaryllidaceae family. It has a distinctive onion-like odor and produces clusters of white, bell-shaped flowers on tall, triangular stems. The leaves are long, narrow, and triangular in shape.
Plant Care Instructions
Outdoor Size Range
18-24 inches (45-60 cm)
Light Requirements
Allium triquetrum thrives in full sun to partial shade, requiring at least 4-6 hours of direct sunlight daily. It can tolerate some shade but may produce fewer flowers.
Humidity Needs
Allium triquetrum prefers moderate humidity levels, but it can tolerate dry air.
Fertilizing Schedule
Fertilize Allium triquetrum in the spring with a balanced, slow-release fertilizer. Avoid over-fertilizing, which can lead to excessive foliage growth and reduced flowering.
Pruning Guidelines
Remove spent flowers and yellowing foliage to encourage continued blooming and prevent disease. Cut back the foliage to the ground in the fall after it has died back naturally.
Common Pests and Diseases
Allium triquetrum is relatively pest-free but may be susceptible to onion thrips and bulb mites. Treat infestations with insecticidal soap or neem oil.
Indoor Size Range
12-18 inches (30-45 cm)
Watering Schedule
Water Allium triquetrum regularly, keeping the soil consistently moist but not waterlogged. Reduce watering in the fall and winter when the plant is dormant.
Temperature Range
Allium triquetrum is hardy in USDA zones 8-10 and prefers temperatures between 60-75°F (15-24°C). It can tolerate temperatures as low as 20°F (-6°C) but may die back to the ground and resprout in the spring.
Growing Season
Allium triquetrum blooms in the spring and summer and goes dormant in the fall and winter.
Growing Difficulty Level
Allium triquetrum is an easy-to-grow plant that requires minimal care and maintenance. It is a good choice for beginner gardeners.
USDA Hardiness Zones
USDA hardiness zones 8-10
Did You Know?
Allium triquetrum is native to the Mediterranean region and was introduced to North America as an ornamental plant. It has since become an invasive species in some areas, including the western United States.
