Plant Data Sheet


Species (common name, Latin name)

Allium acuminatum, Hooker’s or Tapertip onion

Image © 2004, Ben Legler



East of the Cascades, Washington to California, east to Wyoming; also in northwest Washington and Vancouver Island, British Columbia


Climate, elevation

Common in dry, open, often rocky areas, low to moderate elevations in the mountains


Local occurrence (where, how common)



Habitat preferences

Dry, sunny, brushy or wooded slopes/summits/ & flats; in volcanic areas


Plant strategy type/successional stage



May be collected as: (seed, layered, divisions, etc.)

Seeds in late summer.


Propagation recommendations (plant seeds, vegetative parts, cuttings, etc.)

Reproduction by seeds. Seed - sow spring in a cold frame. Prick out the seedlings into individual pots when they are large enough to handle - if you want to produce clumps more quickly then put three plants in each pot. Grow them on in the greenhouse for at least their first winter and plant them out into their permanent positions in spring once they are growing vigorously and are large enough. Division in spring. Very easy, the plants divide successfully at any time in the growing season and the divisions can be planted straight out into their permanent positions if required.



Soil or medium requirements (inoculum necessary?)

Medium to course soils. pH between 6 and 8.


Care requirements after installed (water weekly, water once etc.)

Requires little moisture.


Normal rate of growth or spread; lifespan

Rapid growth rate. 1 foot mature height. Short lifespan.


Sources cited

  1. UW Herbarium
  2. USDA-NRCS Plants Database

  2. Plants for a Future:


Data Compiled by Robert Franco 5/27/06