Allium 'Cowanii'

West Cork Bulbs

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Allium 'Cowanii': The Delicate White Star of Spring

Brighten your garden corners with the elegant simplicity of Allium 'Cowanii'. Unlike the giant purple globes often associated with the Allium family, this variety produces loose, airy clusters of pure white, star-shaped flowers. It is highly prized by gardeners not just for its beauty, but for its scent; it is one of the few decorative onions that carries a sweet, delicate fragrance, making it a joy to grow near pathways or patios. Growing on slender but sturdy stems, it is an excellent naturaliser that creates soft clouds of white highlights in borders, rock gardens, or containers.

  • Sweet Fragrance: Unlike most ornamental onions, the 'Cowanii' blooms possess a pleasant, sweet scent, making them perfect for cutting and bringing indoors.
  • Versatile Colour: The crisp, snow-white blooms act as a fantastic neutral in the garden, cooling down "hot" borders of reds and oranges, or complementing cool blues and purples.
  • Superb Naturaliser: This variety is known for its ability to multiply and spread over time. Once established, it returns year after year with increased vigour.
  • Pollinator Magnet: The open flower structure makes the nectar easily accessible, attracting bees and butterflies in droves during late spring.

Gardener's Tip: Pot Planting for Patios

Because Allium 'Cowanii' is more compact and boasts that lovely sweet scent, it is the ideal choice for container gardening. Plant a lasagne-style pot with 'Cowanii' at the top and later-flowering tulips beneath. Place the pot near your back door or a bench where you sit often, so you can fully appreciate the fragrance on a warm spring afternoon.

Pack Size
Bag of 30 or 100 Bulbs
Flower Colour
Pure White
Flower Size
Loose clusters approx. 5–7 cm wide
Planting Time
September to December
Bloom Time
May (Late Spring)
Mature Height
30 – 40 cm tall
Bulb Spacing
5 - 8 cm apart.
Bulb Size
4/5 cm
Planting Depth
Plant 10 cm deep
Warnings
Do not eat ornamental bulbs - could also be harmful to animals - it is highly recommended to wear gloves when planting as some bulbs can cause irritations.


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