Allium Firmament Ornamental Onion Bulbs

Allium Firmament Ornamental Onion Bulbs

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Considered one of the very best allium varieties
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Pack Size
Pack of 6
  • Buy 3 for $31.50 each and save 10%
Key Characteristics
Zone
5 - 8
Mature Height in Inches
3 Feet
Mature Width in Inches
8 IN
Sun / Shade
Full Sun, Part Shade
Moisture Level
Moist, well-drained

Description / Allium Firmament Ornamental Onion Bulbs

Plant Allium Firmament ornamental onion bulbs before the first frost in fall, and early the next summer, they bloom in baseball-sized flower heads dense with dark silvery-purple florets atop tall scapes rising 24 to 36 inches above a basal rosette of strappy leaves. A favorite of gardeners and pollinators alike, including bees and butterflies, the fragrant flowers are long-lived, staying beautiful in garden for several weeks and remaining attractive even after the flowers fade and the flower heads go to seed. These beautiful blooms make excellent cut flowers, fresh or dried.

An Allium giganteum species, commonly called ornamental onion or giant onion, Firmament is a bulbous perennial with an upright habit and one of the tallest of the ornamental onions. Alliums are in the same family as many edible plants, including garlic, onions, chives, and shallots; but ornamental alliums add an architectural element to the garden with their rounded pompom blooms. Mass plantings of alliums are the most impressive, naturalized in the lawn or ribboned through a mixed bed or border. But they grow well in deep patio pots too and are a great option for a layered lasagna bulb planting with grape hyacinths and anemones.

Ornamental onions are easy to grow. Plant Firmament allium bulbs 8 inches apart and 6 to 8 inches deep an water well to settle bulbs. Once growth begins, feed bulbs with a well-balanced fertilizer. Site in a sunny sheltered location with average, medium moist, freely draining soil. Alliums are not picky about soil type, but soggy soils will cause bulbs to rot. If overcrowding becomes a problem and flower production decreases, dig, divide, and replant the bulbs. Deer and rodents tend to leave ornamental onions alone.

Visit our Bulb Supplies page to find all the tools and materials you need to successfully plant and maintain your bulb plants.

Product Details

SKU 44224-PK-6
Item Form Bulb
Pack Size Pack of 6
Genus Allium
Species giganteum
Variety Firmament
Product Classification Bulbs
Habit Upright
USDA Zone Low 5
USDA Zone High 8
Sun / Shade Full Sun, Part Shade
Moisture Level Moist, well-drained
Bloom Color Black, Purple
Bloom Season Start Early Summer
Bloom Season End Early Summer
Mature Width in Inches 8.00
Mature Height in Inches 36.00
Resistance Deer Resistance, Drought Tolerant, Heat Tolerant
Special Features Butterfly Lovers, Easy Care Plants
Uses Beds, Border, Containers, Cut Flowers
Zone 5, 6, 7, 8
State Shipping Restrictions GU, PR, VI
Shipping Method Restrictions expressShipping

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