Botanical Name: Allium dichlamydeum
Common Name: Coastal Onion
Clumps of grass-like leaves with flowers in the Spring. The stems are green-brown, and the plant omits an onion smell when crushed. This form of onion is toxic and should not be eaten.
Plant Family: Amaryllidaceae
Plant Type: Bulb
Height by Width: 1' H
Growth Habit: Clumps of grass-like leaves
Deciduous/Evergreen: Summer dormant
Growth Rate: Fast
Sun Exposure: Full sun to part shade
Soil Preference: Prefers dry, clay soils on or near sea cliffs
Water Requiremenets: Dry summer dormancy
Cold Hardy to: 2,400'
Flower Season: Spring
Flower Color: Rose to red
Endangered? Not Listed
Distribution: North Coast, n Central Coast
Natural Habitat: Northern Coastal Scrub, Mixed Evergreen Forest
Care and Maintenance
- Plant the base of the bulb at a depth three times the height of the bulb. Stop watering once the leaves begin to turn brown, but keep leaves on the plant until they turn completely brown.
- Harlow, Nora and Kristin Jakob. Wild Lilies, Irises, and Grasses: gardening with California Monocots. Berkeley and Los Angeles, CA: University of California Press. 2003.