Plant Data Sheet: Hairy manzanita Arctostaphylos columbiana
Hairy manzanita is found along the
This plant is occasionally found on the western slopes of
Hairy mazanita grows at elevations
up to 2,500 feet in
Hairy manzanita is typically found in rocky areas and steep slopes. It prefers full sun, well-drained, acidic soil, and a southern or western exposure. It is highly drought tolerant (1,3).
Plant strategy type/successional stage
Often a primary or secondary colonizer of disturbed plant communities, hairy manzanita is commonly found in post-logging plant communities. Once established in such a situation, it will persist after forest establishment if the canopy is not too dense (1).
Hairy manzanita is often found
with other ericaceous plants such as huckleberry, salal
and Pacific madrone.
Other common species include Oregon grape (Mahonia spp.),
spp.), vine maple (Acer circinatum), beargrass
various penstemon species,
May be collected as: (seed, layered, divisions, etc.)
Hairy manzanita may be propagated by seed, cuttings, layering, or salvaging. The fruit is small, 1/4 - 1/2 inches in diameter, and is smooth and red. It begins to ripen in late June and may stay on the plant until the following spring (1).
Collection restrictions or guidelines
Cuttings are best collected in March, September, October, or November (2).
Hairy manzanita requires fire to break seed dormancy and maximize germination. This can be simulated with a hot water bath. The procedure for a hot water bath is as follows: Boil 3-6 cups of water for every cup of seeds. Avoid using an aluminum pan or softened water, as either might introduce toxic chemicals to the seeds. After the water reaches boiling, let it cool for a minute or two. Pour the seeds into the water and let them sit at room temperature for 24 hours. The seeds may still need to over-winter or be cold-stratified before they will germinate (5). Other suggested methods include soaking dried seed in boiling water for 10 - 20 seconds or exposing to smoke and then stratifying at 2 - 5°c for 2 months. The seeds will germinate in 2 - 3 months at 15°c (4).
Information on seed life is not available.
Recommended seed storage conditions
Information on seed storage conditions is not available.
Recommended propagation is through basal cuttings (from the area close to the previous year’s wood, or the base of a long juvenile stem). The cuttings should be dipped in a rooting hormone. Stimroot #3 IBA is recommended. They can then be rooted in 1:1 perlite/peat moss media with bottom heat (2).
Soil or medium requirements
Cuttings should be propagated in a perlite/peat mixture (see above).
Installation of plugs or containerized individuals is recommended.
Recommended planting density
Shrubs should be installed 3-5 feet on center, depending on desired density and expected mortality (3).
Care requirements after installation
While hairy manzanita is highly drought resistant, supplemental water after installation increases plant survival and establishment.
Normal rate of growth or spread; lifespan
Hairy manzanita grows quickly and can reach several feet in height (1).
(2) Malaspina University-College Horticulture Department. Abstract on Native Plant Propagation Collaborative Study. http://www.mala.ca/horticulture/abstract.htm. Retrieved May 14, 2003.
(3) Plants for a Future. Arctostaphylos columbiana. http://gardenbed.com/A/448.cfm. Retrieved May 14, 2003.
(4) Sound Native
Data compiled by (student name and date)
Sarah Baker (