Giant Onion
Allium giganteum
Plant Details:
Plant Type: Perennial
Plant Family: Amaryllidaceae
Plant Description: Bulbous ornamental perennial onion and the largest of its kind. Forms light green strap-like basal leaves up to three feet long. Bears dense umbels of numerous star-shaped purple flowers. Plant bulbs about a foot apart in clumps for the best effect.
Maintenance:
Maintenance Type: Perennial - Herbaceous
Plant Care: Perennial - Herbaceous (soft-stemmed plants that die back in winter and regrow in spring): Remove spent blooms to promote rebloom later. Some plants tend to flop over after the first bloom and attempt to regrow from the base; in these cases, the old stems can be cut away in summer. As plants become dormant in the fall, remove dead leaves and stems.
Plant Attributes:
Mature Size: 36-60" tall x 18-24" wide
Utah Native: No
Plant Select: No
Pollinator Friendly: Yes
Localscapes: Infill Plant, Perimeter Plant
Foliage Interest: No
Foliage Colors: Light Green
Bloom Colors: Purple
Bloom Seasons: Late Spring
Bloom Period: May - Jun
Growing Conditions:
Hardiness Zone: 5 to 8
Light Requirement: Full Sun (6+ hrs sun)
Irrigation Requirement: 
Low (1/2" every 10-14 days)
Low (1/2" every 10-14 days)
Salt Tolerant: Unknown
Deer Resistant: Unknown
Garden Location:
-
Neighborhood Landscapes
- Prudent Perennials
-
Spring -
Summer -
Fall -
Winter
