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Allium hollandicum ‘Purple Sensation’ (Ornamental Onion)

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AGM Award
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Allium Hollandicum 'Purple Sensation' , Allium 'Purple Sensation', Allium Aflatunense 'Purple Sensation', Flowering Onion, Ornamental Onion, Allium Hollandicum, Spring Bulbs, Spring Flowers
Allium Hollandicum 'Purple Sensation' , Allium 'Purple Sensation', Allium Aflatunense 'Purple Sensation', Flowering Onion, Ornamental Onion, Allium Hollandicum, Spring Bulbs, Spring Flowers

A favorite of many gardeners, multiple award-winner Allium hollandicum ‘Purple Sensation’ is a striking ornamental onion with perfectly round flowerheads, 3 in. wide (8 cm), packed with dozens of small, star-shaped, rich violet-lilac flowers. They are borne atop sturdy stalks, which arise from a group of 6 to 8 handsome, blue-green leaves. Blooming in late spring to early summer, this spectacular Allium enjoys long-lasting blooms and makes outstanding cut flowers that will last for 2 weeks.

  • Awarded the prestigious Award of Garden Merit by the Royal Horticultural Society
  • Growing up to 28 – 36 inches tall (70 – 90 cm), this beauty naturalizes easily and will come back year after year!
  • Easily grown in rich, sandy to gritty, dry to medium moisture, well-drained soils in full sun. This Allium is drought tolerant.
  • Known for attracting bees, butterflies, ​moths, and other pollinators, but deer ignore it.
  • Stunning in beds, borders, and cottage gardens. Spectacular in large sweeping drifts. Plant in groups (at least 10 to 15 bulbs) for the best visual impact. Excellent as cut flowers for both fresh and dried arrangements!
  • Mixes beautifully with other late spring flowering bulbs and creates stunning combinations with pink or white delphiniums, peonies, or irises.
  • To be planted in fall.
  • Propagate by seed, sowing in containers in a cold frame when just ripe or in the spring. Alternatively, remove offsets in autumn.

Hundreds of Allium species exist, but only a few have made a name for themselves as garden plants. The ornamental onions distinguish themselves by their remarkable diversity in color, inflorescence, and flowering height. Many species bloom in early summer – just after the spring-flowering period and just before the exuberant full bloom of summer. Certain small species are just perfect for a rock garden, and several lend themselves to naturalizing. All species can be used in the border.

Learn How To Plant And Care for Your Spring Flower Bulbs


 To achieve optimum flowering results, it is important to plant the bulbs at the right time.

Requirements

Hardiness 4 - 9
Heat Zones 1 - 9
Climate Zones 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Bulbs
Plant Family Amaryllidaceae
Genus Allium
Common names Ornamental Onion, Onion
Exposure Full Sun
Season of Interest Spring (Late)
Summer (Early)
Height 2' - 3'
(60cm - 90cm)
Spread 1' - 2'
(30cm - 60cm)
Spacing 8" (20cm)
Depth 8" (20cm)
Maintenance Low
Water Needs Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Fragrant, Plant of Merit, Showy
Tolerance Drought, Deer, Rabbit
Attracts Bees, Butterflies
Garden Uses Beds And Borders
Garden Styles Informal and Cottage, Formal Garden
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Do I Need?
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Alternative Plants to Consider

Allium cepa Aggregatum Group (Shallot)
Allium cepa (Onion)
Allium sativum (Garlic)
Allium ‘Purple Rain’ (Ornamental Onion)
Allium ‘Pinball Wizard’ (Ornamental Onion)
Allium ‘Ostara’ (Ornamental Allium)

Recommended Companion Plants

Euphorbia palustris (Marsh Spurge)
Aquilegia vulgaris var. stellata ‘Blue Barlow’ (Columbine)
Allium giganteum (Ornamental Onion)
Geranium ‘Patricia’ (Cranesbill)
Rosa Princess Alexandra of Kent (English Rose)
Rosa Scepter’d Isle (English Rose)
Lychnis coronaria (Rose Campion)
Lupinus ‘The Governor’ (Lupine)
Tulipa ‘Queen Of Night’ (Single Late Tulip)

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Allium (Ornamental Onion)
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Bulbs that return to the garden year after year!
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Small Allium Species for the Rock Garden
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While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 4 - 9
Heat Zones 1 - 9
Climate Zones 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Bulbs
Plant Family Amaryllidaceae
Genus Allium
Common names Ornamental Onion, Onion
Exposure Full Sun
Season of Interest Spring (Late)
Summer (Early)
Height 2' - 3'
(60cm - 90cm)
Spread 1' - 2'
(30cm - 60cm)
Spacing 8" (20cm)
Depth 8" (20cm)
Maintenance Low
Water Needs Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Fragrant, Plant of Merit, Showy
Tolerance Drought, Deer, Rabbit
Attracts Bees, Butterflies
Garden Uses Beds And Borders
Garden Styles Informal and Cottage, Formal Garden
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Allium
Guides with
Allium
Not sure which Allium to pick?
Compare Now

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    Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.

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