Allium triquetrum
"Three-cornered leek"
Orders placed before 1 September 2024
You can expect your order in September 2024
Orders placed 1 September - 15 October 2024
You can expect your order in October 2023
Orders placed 16 October - 15 December 2024
You can expect your order within 10 business days
UK orders over £50
Free shipping
UK orders under £50
£4.99
Northern Ireland orders under £50
£5.99
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Description
Fill out a space and supress weeds with this effective ground-covering Allium triquetrum. Flowering in spring with elegant white blooms, Three-cornered Leek is a good plant for adding interest to a tricky planting area which is otherwise bare, such as along hedges and under trees. If you’re looking to attract pollinators to the garden or have a designated wild area on your patch, this allium provides plenty of nectar-rich blooms that bees will love!
The bulbs of Allium triquetrum multiply over the years and the flowers also set seed, meaning this variety naturalises quickly. Spreading to form dense clumps over time, it fills an empty space with effective leaf coverage as well as more and more blooms each spring. Allium triquetrum can’t be planted in the wild, but you can let it loose in your garden where there’s room for it to run riot!
A. triquetrum has various common names, ranging from triquetrous leek to three-cornered leek and three-cornered garlic.
⚠️ Please note: Allium triquetrum spreads freely and is considered invasive in some countries, including the UK. It should not be planted in any space where it can spread into the wild.
Key features
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Good for cutting
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Comes back every year
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Attractive to wildlife
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Loved by pollinators
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Packed in paper bags
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Low maintenance
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Fully hardy
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Rodent resistant
Specs & details
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Botanical name
Allium triquetrum
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Flower colour
White
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Bulb size
5/+
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Established height
20-30cm
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Established spread
10-20cm
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Plant spacing
100 bulbs per m2
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Leaf colour
Green
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Habit
Upright
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Life cycle
Perennial
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Hardiness
Fully hardy
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Years to establish
1st year
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Sunlight
Full sun
Partial shade -
Position
Sheltered
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Suitable for
Large containers
Borders
Gravel gardens
Coastal gardens
Cottage gardens
Low maintenance gardens
Cut flower Gardens
Wildlife gardens -
Soil acidity
Any
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Soil moisture
Free draining
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Soil type
Loam
Sandy
Stony
Multipurpose compost
Loam-based compost -
Growing skill
Easy to grow
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Scented
No
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Pollinator-friendly
Yes
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Mouse resistant
Yes
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Rabbit resistant
Yes
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Deer resistant
Yes
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Toxicity
Skin/eyes irritant
Plant calendar
| Jan | Feb | Mar | Apr | May | June | July | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
- Planting
- Flowering
Useful information
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Plant your Allium triquetrum bulbs from mid to late autumn;
Plant in borders or containers in sun or partial shade;
Plant your "Three-cornered leek" bulbs two to three times as deep as the bulb is high;
Space the bulbs about twice the bulb diameter apart;
Place the Allium triquetrum bulbs with the pointed side facing upwards.
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Orders placed before 1 September 2025
You can expect your order in September 2025Orders placed 1 September - 15 October 2025
You can expect your order in October 2025Orders placed 16 October - 15 December 2025
You can expect your order within 10 business days
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