Plant
Data Sheet
Nodding
Onion, Allium cernuum Roth
Found throughout the
Moist, cool sites. Found in mountain areas, 600-3500 meters.
Local
occurrence (where, how common)
Very common on the west side of the Cascades.
Rocky
areas, meadows, grasslands, and open forests. Shade
intolerant.
Plant
strategy type/successional stage (stress-tolerator, competitor, weedy/colonizer, seral,
late successional)
Drought tolerant. Pioneer seral
stage.
Associated
species
Pseudotsuga menziesii,
Juniperus scopulorum, Acer glabrum, Amelanchier spp., Vaccinium
spp., Mahonia repens, Holodiscus discolor, Thalictrum occidentale, Arnica cordifolia, Calamagrostis rubescens.
May be collected as: (seed, layered, divisions,
etc.)
Seeds, bulbs, transplants.
Collect seed September to October.
Seed
germination (needs dormancy breaking?)
Stratification
not necessary if planted out in the fall. If not sowing in fall, sowing should
occur between February and July. After sowing, container should be covered with
plastic and kept at 60-65ºF for 2 weeks, then placed
in a cold room for 3-6 weeks. The container should then be kept at 65-70ºF. If
after 6-10 weeks, germination doesn’t occur, put back
in to cold room for 3-6 more weeks, removing should germination occur.
Transplanted seedlings should be placed in cold frame and planted out the
following spring.
Seed
life (can be stored, short shelf-life, long shelf-life)
One
year.
Store
this seed for 3-4 months in a cold room of 34-36 degrees F.
Propagation
recommendations (plant seeds, vegetative parts, cuttings, etc.)
Seeds, bulb division.
Soil or medium requirements (inoculum
necessary?)
Must be kept moist.
Installation
form (form, potential for successful outcomes, cost)
Bulb divisions.
Twelve-inches apart.
Care
requirements after installed (water weekly, water once etc.)
Keep
soil moist.
To
20 inches tall, less than one-foot across, medium growth rate. One to three-year lifespan.
1. Royal BC Museum: http://www.royalbcmuseum.bc.ca/nh_papers/nativeplants/index.html
2.
3. Flora of
4. Native Plants Propagation
Protocol Database: http://nativeplants.for.uidaho.edu/network/
5. Thompson and Morgan: http://seeds.thompson-morgan.com/us/
6. Native Crops Urban
Agriculture: http://www.cityfarmer.org/nativecrops.html
7. ECOS Guide to the Ecology of
the
8.
Northeast Oregon Hatchery Program Grande Ronde-Imnaha Spring Chinook Hatchery Project: Biological
Assessment: http://www.efw.bpa.gov/environmental_services/Document_Library/Grand_Ronde/NEOHBA052404.pdf
9.
Plant Indicator Guide for
10.
11.
Eseeds.com: http://www.eseeds.com/
Lorraine
Brooks
May
10, 2006