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Geum (macrophyllum)

Tara Luna
USDI NPS - Glacier National Park
West Glacier, Montana 59936
(406) 888-7835
http://plant-materials.nrcs.usda.gov/azpmc
Family Scientific Name: Rosaceae
Family Common Name: Rose family
Scientific Name: Geum macrophyllum Willd.
Common Name: Large leaved avens
Species Code: GEUMAC
Ecotype: Spruce/Fir forest, 1150m elevation, Glacier National Park, Flathead Co., MT.
General Distribution: G. macrophyllum occurs in moist forests, meadows, and stream banks, from sea level to the subalpine; from Alaska to Baja California, east from B.C. to Great Lakes Region and Nova Scotia. It also occurs in Asia.
Propagation Goal: plants
Propagation Method: seed
ProductType: Container (plug)
Stock Type: 116 ml conetainers
Time To Grow: 4 Months
Target Specifications: Stock Type: Container seedling<br> Height: 8 cm, 4 to 6 leaves<br> Caliper: n/a<br> Root System: Firm plug in container.
Propagule Collection: Seeds are hand-stripped from the inflorescences when the achenes turn brown in early fall.Seeds are collected in paper bags and kept in a well ventilated dring shed prior to cleaning.
Propagule Processing: Seeds are threshed with hammermill, run over with office clipper. Seeds are cleaned by NRCS.
Seed longevity is 3 to 5 years at 3 to 5C in sealed containers.
Seed dormancy is classified as physiological dormancy.
Seeds/Kg: 1,746,153/kg
% Purity: 100%
% Germination: 90 to 100%
Pre-Planting Treatments: Seed Treatments: None.
Growing Area Preparation/
Annual Practices for Perennial Crops:		 Greenhouse and outdoor nursery growing facility.
Sowing Method: Direct Seeding. Seeds are covered with media.
Growing media used is 70% 6:1:1 milled sphagnum peat, perlite, and vermiculite and 30% sand 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 172 ml 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 appears to be uniform and rapid; 7 to 10 days after sowing in the greenhouse.
Length of Establishment Phase: 4 weeks
Active Growth Phase: Growth following germination and thinning is rapid; plants are root tight in container in 8 weeks. Plants are fertilized with 13-13-13 liquid NPK at 100 ppm bi-weekly during the growing season.
Length of Active Growth Phase: 8 weeks
Hardening Phase: Plants are fertilized with 10-20-20 liquid NPK at 200 ppm in early fall; pots are leached with water, irrigation is gradually reduced through September and October.
Length of Hardening Phase: 4 weeks
Harvesting, Storage and Shipping: Total Time To Harvest: 4 months
Harvest Date: September
Storage Conditions: Overwinter in outdoor nursery under insulating foam cover and snow.
Length of Storage: 5 months
Other Comments: Vegetative Propagation Method: Divisions of established nursery stock can be done since this species is rhizomatous.
References: Flora of the Pacific Northwest, Hitchcock and Cronquist, Univ. of Washington Press, 7th printing, 1973.
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.

Citation:

Luna, Tara; Evans, Jeff; Wick, Dale; Hosokawa, Joy. 2004. Propagation protocol for production of Container (plug) Geum macrophyllum Willd. plants 116 ml conetainers; USDI NPS - Glacier National Park West Glacier, Montana. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/04/21). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.