Allium giganteum

Ornamental Onion

Note: This is an archive page preserved for informational use.
Cultural and Growing Info is provided below.

Truly a Showstopper!
Giant it is! Softball-sized 5-6” rounded clusters of purple florets rise on thick leafless stalks above the center rosette of grayish-green, strap-like foliage. Foliage tends to die back as plants begin flowering. Protect from windy locations. We suggest staking to ensure that no damage occurs during flowering. Onion-scented foliage and flowers keep deer and rabbits at bay. 1 bulb per bag. Bulb size 20+ cm. Easy care, Alliums multiply naturally and can be left undisturbed in the same area for years. Butterflies adore Ornamental Onion! Allium giganteum, with its interesting flower shape, creates texture and depth. It adds a perky, colorful focus to your summer garden. You will love this low maintenance, dependable garden workhorse and pollinators will too!

Code BALGI

Patent

Plant Type Bulbs

Species

Height Tall 4'

Spacing Plant 18" apart

Bloom Time Late Spring to Early Summer

Sun / Shade Full Sun

Zones 4-8

Soil Type Normal, Acidic, Sandy

Water Needs Low

Sold In Bags of 1

Special Features

  • Beneficial for Pollinators
  • Attracts Butterflies
  • Good for Cut Flowers
  • Deer Resistant
  • Fragrant
  • Long-Blooming
  • Rabbit Resistant
  • Winter Interest
  • Hot Dry Site Tolerant
  • OK in Containers

Allium General Information

Late blooming ornamental plants that work great with early flowering perennials. Do not plant too closely together since they multiply rapidly. Plant Alliums in full sun in early fall. Water well throughout the growing season. *Please note: We are not permitted to ship Alliums to Idaho or the Washington counties of Adams, Benton, Franklin, Grant or Klickitat.

Allium Plant Care

The smaller varieties of Allium should be planted 4" deep and the larger varieties 7-8" deep. Spacing 6-8". Clumps may be lifted and divided in either spring or fall. Allium will tolerate most soils, but performs best in sandy soils. Add organic matter like compost to clay soils if needed to improve drainage and lighten the soil.

100% Guarantee

We offer a 100% guarantee for all our accent annuals and bulbs to reach you in good condition and come up. If you're not satisfied, we'll reship or refund immediately. Please don't hesitate to contact us if you have questions or concerns—we share your passion for gardening and want your new plants to thrive in your border!

Shipping Details

We ship accent annuals and bulbs based on the best planting time for your growing zone (see the approximate dates below), unless otherwise indicated at checkout. If you wish, you can indicate a specific ship date during checkout.

Spring-Planted Accent Annuals

  • Zone 3, 4: Early to Mid May
  • Zone 5: Late April to Early May
  • Zone 6: Mid to Late April
  • Zone 7: Early to Mid April
  • Zone 8,9, 10: Early April

Fall-Planted Bulbs

  • Zone 2, 3, 4: Early September
  • Zone 5: Early to Mid September
  • Zone 6: Mid September
  • Zone 7: Mid to Late September
  • Zone 8, 9, 10: Late September to Early October

Holiday Bulbs

  • Early November through mid December

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