Carried by 14 nurseries
View Availability at NurseryData provided by the participants of the Consortium of California Herbaria
View additional distribution information on the Jepson eflora
Allium unifolium, the one-leaf onion or American garlic, is a North American species of wild onion. It is native to the coastal mountain ranges of California, Oregon, and Baja California. It grows on clay soils including serpentine, at elevations up to 1100 m. Allium unifolium, despite its name, usually has 2-3 flat leaves up to 50 cm long. Bulbs, though, are usually solitary, egg-shaped, up to 2 cm long, often formed at the end of rhizomes spreading out from the parent plant. Scapes are round in cross-section, up to 80 cm tall. Flowers are up to 15 mm across; tepals usually pink but occasionally white; anthers yellow or purple.
Perennial herb, Geophyte
1 - 3 ft Tall
1 in Wide
Upright Columnar
Slow
Summer Deciduous
Slight
Lavender, Pink, Yellow, White, Purple
Spring
Containers, Deer resistant
Deep Shade, Partial Shade
Moderate
Never irrigate once established
Easy
Tolerates cold to 10° F
Slow
Prefers heavy soils but tolerates a variety of garden soils. Tolerates serpentine soils.
Soil PH: 7.0 - 9.0
4, 5, 6, 7*, 8, 9*, 14*, 15*, 16*, 17*, 18, 19*, 20*, 21*, 22*, 23*, 24*
Pockets of grassland within forest or chaparral, or grassy streambanks with moist clay soils, in the Coast Ranges and foothills
Chaparral, Montane Chaparral
Native grasses, Miner's Lettuce (Claytonia rubra ssp. depressa), Dudleya spp.
Butterflies and moths supported
0 confirmed and 16 likely
Ipsilon Dart
Agrotis ipsilon
The Nutmeg
Anarta trifolii
Fruit-Tree Leafroller Moth
Archips argyrospila
Alfalfa Looper Moth
Autographa californica