Threebract Onion

Allium tribracteatum

Native to:
United States

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Amaryllidaceae
Genus:
Allium
Species:
Allium tribracteatum
USDA Symbol:
ALTR2

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Geophyte
Height:
50 cm
Light Requirements:
Full Sun
Drought Tolerance:
Medium
Bloom Months:
apr,may,jun
Bloom Colors:
white, pink

Wildlife Benefits

Bees:
★☆☆☆☆ Documented bee visitation (GBIF)

Garden & Ecology Notes

Wildlife Value:
bees, native pollinators
Deer Resistant:
Yes
Fragrant:
Yes
Fire Ecology:
Fire adapted — tolerates or benefits from fire
Fire Notes:
Bulbs resprout vigorously after fire. Common in post-fire grassland and chaparral communities where it benefits from reduced competition.

Soil Requirements

Soil Type:
rocky, well-drained, sandy soil
pH:
6.0 - 7.5 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
native to rocky slopes and ridges

Propagation & Germination

Stratification:
Cold/moist stratification required — 30–60 days
Germination Time:
14–30 days
Notes:
Seeds germinate best with cool temperatures and moisture. May show delayed or sporadic germination typical of wild onions.