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Protocol Information

Native Plant Nursery
USDI NPS - Glacier National Park
West Glacier, Montana 59936
(406) 888-7835

Family Scientific Name: Rosaceae
Family Common Name: Rose family
Scientific Name: Sibbaldia procumbens L.
Common Name: Sibbaldia
Species Code: SIBPRO
Ecotype: Subalpine meadows, Logan Pass, 2032m elev. 
General Distribution: S. procumbens occurs on open moist to dry alpine slopes. It is a circumpolar species. In North America, it occurs south to California, Colorado, Quebec, and New Hampshire.
Propagation Goal: Plants
Propagation Method: Seed
Product Type: Container (plug)
Stock Type: 160 ml conetainers
Time To Grow: 9 Months
Target Specifications: Stock Type: Container seedling
Height: 4 cm, 6 to 10 true leaves
Caliper: n/a
Root System: Firm plug in container.
Propagule Collection: Seeds are collected when achenes are turn tan in mid to late August. Seed capsules are cut from plants using scissors and are are collected in paper bags. Seeds are kept in a well ventilated drying shed prior to cleaning.
Propagule Processing: Seeds are cleaned using a hammermill, followed by air screening at NRCS.
Seed longevity is unknown.
Seed dormancy is classified as physiological dormancy.
Seeds/Kg: 3,400,000/kg
% Purity: 100%
% Germination: 80 to 90%
Pre-Planting Treatments: 5 month outdoor cold, moist stratification. Seeds are surface sown for the light requirement.
Growing Area Preparation/
Annual Practices for Perennial Crops:

Outdoor nursery growing facility.
Growing medium used is 6:1:1 milled spaghnum 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.
Conetainers are filled and sown in late fall and irrigated thoroughly prior to winter stratification. Seedlings germinate in spring under fluctuating outdoor temperatures and are grown under full sun exposure. 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: Seedlings germinate in May under fluctuating temperatures. Seedlings germinate non-uniformly over a 4 week period. True leaves emerge 2 weeks after germination. After seedlings are well established, they ust dry down between irrigations. Initial root development is very rapid.
Length of Establishment Phase: 4 weeks
Active Growth Phase: Once seedlings are established, plants develop rapid shoot and root growth. Seedlings are fertilized with 20-10-20 liquid NPK at 100 ppm weekly during the growing season. Plants quickly fill conetainers and are root-tight in 9 weeks.
During active growth, seedlings must dry down between irrigations and spaced as needed for adequate air flow.
Length of Active Growth Phase: 9 weeks
Hardening Phase: Plants are fertilized with 10-20-20 liquid NPK at 200 ppm in early fall. Irrigation is gradually reduced through September and October. Seedlings are leached with water before winterization.
Length of Hardening Phase: 4 weeks
Harvesting, Storage and Shipping: Total Time To Harvest: 9 months
Harvest Date: July and August
Storage Conditions: Overwinter in outdoor nursery under insulating foam cover and snow.
Length of Storage: 5 months
Outplanting performance on typical sites: Outplanting Site: Logan Pass, Glacier National Park, MT.
Outplanting Date: After snowmelt at high elevations.
Outplanting Survival at 3 Years: 79%
Other Comments: Germination percentages were very low under warmer 21 to 25C/15C (day/night) greenhouse temperatures. Outdoor stratification and germination under fluctuating temperatures in early spring resulted in high germination rates.
This species is a frequent colonizer of disturbed areas at high elevations.

Vegetative Propagation: Type of Cutting: Ramets can be divided from established nursery stock.

References: Flora of the Pacific Northwest, Hitchcock and Cronquist, Univ. of Washington Press, 7th printing, 1990.

Seed Germination Theory and Practice, Second Edition, Deno, Norman, published 1993.

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. and Brenneman, B., unpublished.

Luna, Tara; Evans, Jeff.; Corey, Susan.; Hosokawa, Joy.; Wick, Dale. 2008. Propagation protocol for production of container Sibbaldia procumbens L. plants (160 ml conetainers); USDI NPS - Glacier National Park, West Glacier, Montana. In: Native Plant Network. URL: http://www.nativeplantnetwork.org (accessed 27 August 2015). Moscow (ID): University of Idaho, College of Natural Resources, Forest Research Nursery.