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Rosa (woodsii)

Tara Luna
USDI NPS - Glacier National Park
West Glacier, Montana 59936
(406) 888-7835

Family Scientific Name: Rosaceae
Family Common Name: Rose family
Scientific Name: Rosa woodsii Lindl.
Common Name: Woods rose
Species Code: ROSWOO
Ecotype: Open forested slopes, Two Medicine, 1585m elev.,
General Distribution: R. woodsii ranges from B.C. east through the Cascades and Rocky Mountains, south to California and Texas and east to Missouri and Wisconsin, New Jersery and Pennsylvania. It inhabits riparian and wetland edges, moist to dry meadows and open forests and open rocky slopes at low to montane elevations.
Propagation Goal: plants
Propagation Method: seed
ProductType: Container (plug)
Stock Type: 172 ml conetainers
Time To Grow: 11 Months
Target Specifications: Stock Type: Container seedling<br> Height: 15 cm<br> Caliper: 7 mm<br> Root System: firm plug in conetainers.
Propagule Collection: Seeds are collected when hips turn red in September and October. Achenes are tan at maturity. Fruits are collected in plastic bags and kept under refrigeration prior to cleaning.
Propagule Processing: Seeds are easily extracted from fruit by maceration using a Dyb-vig cleaner. Seeds are dried and screen to remove any remaining debris.
Seed longevity is up to 20 years at 3 to 5C in sealed containers.
Seed dormancy is classified as physiological dormancy.
Seeds/Kg: 90,000/kg
% Purity: 100%
% Germination: 85%
Pre-Planting Treatments: Seeds are placed into a 3:1 water/3% hydrogen peroxide soak for 10 minutes, followed by a 72 hour running water rinse. After seeds are imbibed, they are placed into a 50 to 60 day warm, moist stratification at 20 C followed by a 90 day cold, moist stratification at 1 to 3 C.
Seeds are placed in fine mesh bags and buried in moist peat moss in ventilated containers. During warm stratification, the containers are kept at 20 C. Stratification medium is re-moistened as needed. During cold stratification containers are placed under refrigeration at 1 to 3 C.
Growing Area Preparation/
Annual Practices for Perennial Crops:
Greenhouse and outdoor nursery growing facility.

Sowing Method: Direct Seeding. Seeds are covered with medium and irrigated thoroughly.
Growing medium used is 6:1:1 milled sphagnum peat, perlite, and vermiculite with Osmocote controlled release fertilizer (13N:13P2O5:13K2O; 8 to 9 month release rate at 21C) and Micromax fertilizer (12%S, 0.1%B, 0.5%Cu, 12%Fe, 2.5%Mn, 0.05%Mo, 1%Zn) at the rate of 1 gram of Osmocote and 0.20 gram of Micromax per conetainer.

Greenhouse temperatures are maintained at 21 to 25C during the day and 16 to 18C at night. Seedlings are hand watered and remain in greenhouse until mid May. Seedlings are then moved to outdoor nursery for the remainder of the growing season.
Seedlings are irrigated with Rainbird automatic irrigation system in early morning until containers are thoroughly leached. Average growing season of nursery is from late April after snowmelt until October 15th.
Establishment Phase: Germination is usually complete in 15 days. Cotyledon to true leaf stage is 2 weeks. Seedlings are thinned at this stage.
Length of Establishment Phase: 4 weeks
Active Growth Phase: Seedling growth is rapid following germination. Seedlings are fertilized with 20-20-20 liquid NPK at 100 ppm and increase in height to 17 centimeters in 10 weeks. Root development is very rapid and conetainers are root tight in 16 weeks.
During active growth, seedlings can be top pruned with shears as needed.
Length of Active Growth Phase: 16 weeks
Hardening Phase: Plants are fertilized with 10-20-20 liquid NPK at 200 ppm during August and September. Irrigation is gradually reduced in September and October. Containers are leached with clear water before winterization.
Length of Hardening Phase: 4 weeks
Harvesting, Storage and Shipping: Total Time to Harvest: 11 months
Harvest Date: September
Storage Conditions: Overwinter in outdoor nursery under insulating foam and snow.
Length of Storage: 5 months
Other Comments: Seedlings are multistemmed and root tight in 3 L (1 gallon) containers in 1.5 years, with an average height of 30 cm and caliper of 1.8 cm at the stem crown base.
Plants reach reproductive maturity in 2 to 5 years.
There are 2 botanical varieties: var. woodsii, and var. ultramontana.
R. woodsi is rated as high for erosion control and restoration due to its high rate of survivalbility.
Birds, small mammals and big game browse fruits and leaves and it is an important source of winter food for many species.
Vegetative Propagation: R. woodsii spreads vegetatively through rhizomes, sprouting from the root crown and layering. Propagation can be easily done by divisions of rhizomes or mound layering of established nursery stock.
References: Flora of the Pacific Northwest, Hitchcock and Cronquist, University of Washington Press, 7th printing, 1990.
Seeds of the Woody Plants in North America, Young and Young, Dioscorides Press, 1992.
Seeds of the Woody Plants in the United States, Agriculture Handbook No. 450, U.S.F.S., Washington D.C., 1974.
Glacier Park Native Plant Nursery Propagation Records, unpublished.
Seeds: Ecology, Biogeography, and Evolution of Dormancy and Germination, Baskin and Baskin, Academic Press, 1998.
1999 Revegetation Monitoring Report, Glacier National Park, Asebrook, J., lamb, B., and Funk, T., unpublished.
1998 Revegetation Monitoring Report, Glacier National Park, Asebrook, J. and Kimball, S., unpublished.


Luna, Tara; Evans, Jeff; Wick, Dale; Hosokawa, Joy. 2008. Propagation protocol for production of Container (plug) Rosa woodsii Lindl. plants 172 ml conetainers; USDI NPS - Glacier National Park West Glacier, Montana. In: Native Plant Network. URL: http://NativePlantNetwork.org (accessed 2020/11/28). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.

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