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Products > Allium unifolium
 
Allium unifolium - One-leaf onion

Note: This plant is no longer in stock. This is an archive page preserved for informational use.  
Image of Allium unifolium
[2nd Image]
Habit and Cultural Information
Category: Bulb/Tuber/Rhizome etc.
Family: Amaryllidaceae (Onions)
Origin: California (U.S.A.)
California Native (Plant List): Yes
Flower Color: Lavender Pink
Bloomtime: Spring/Summer
Height: 1-2 feet
Width: <1 foot
Exposure: Full Sun
Summer Dry: Yes
Deer Tolerant: Yes
Irrigation (H2O Info): No Irrigation required
Winter Hardiness: < 0 °F
Allium unifolium (One-leaf onion) - Native California bulb that forms clumps of grass-like slightly flattened 16 inches tall leaves with taller stalks bearing an umbel of 1/2 inch long lavender pink flowers from late May into July with papery tepals surrounding developing fruit that prolongs the display.

Plant in full sun in most soil types - does particularly well in clay soils. Irrigate in spring (if natural rainfall is light) to early summer - allow to go dry when dormant.

Allium unifolium is native to moist grasslands along forested and chaparral areas along the coastal ranges of California from Humboldt County south to San Luis Obispo County. The name ofr the genus is the Latin meaning "garlic" and the specific epithet "unifolium" meaning "one leaf" and common name One-leafed onion is misleading as there are usually 2 and sometimes 3 or 4 leaves instead of one as these names would imply. 

Information displayed on this page about Allium unifolium is based on our research conducted about this plant in our nursery library as well as from information provided by reliable online resources. We also include our own observations made about it as it has grown in the nursery gardens and other gardens visited, as well how the crops of this plant performed in the containers in our nursery field. We will also include comments received from others and welcome hearing from anyone who has information about this plant, particularly if it includes cultural information aiding others to better grow it.

 
San Marcos Growers closed for regular business at the end of 2025 as the property is being developed for affordable housing.
While our gates remain closed, we will open them by appointment so we can liquidate remaining plants, supplies and equipment. The plants remaining in the field are listed on our Live Inventory Page.
 
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