Heuchera (cylindrica)

Tara Luna USDI NPS - Glacier National Park West Glacier, Montana 59936 (406) 888-7835 http://plant-materials.nrcs.usda.gov/azpmc

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Family Scientific Name:	Saxifragaceae
Family Common Name:	Saxifrage family
Scientific Name:	Heuchera cylindrica Dougl.
Common Name:	Rock Alumroot
Species Code:	HEUCYL
Ecotype:	Open rocky slope, Sun Point, Glacier National Park, Glacier Co., MT., 1585m elevation.
General Distribution:	H. cylindrica occurs on rocky hillsides, cliffs and talus, from B.C. to northeastern California, east to Alberta, Montana, northwest Wyoming, and northern Nevada.
Propagation Goal:	plants
Propagation Method:	seed
ProductType:	Container (plug)
Stock Type:	172 ml conetainers
Time To Grow:	7 Months
Target Specifications:	Stock Type: Container seedling<br> Height: 5 cm, 6 to 10 true leaves<br> Caliper: n/a<br> Root System: firm plug in conetainer.
Propagule Collection:	Seeds are hand collected when capsules begin to turn brown and split. Seeds are black at maturity. Capsules are collected in paper bags and kept in a well ventilated drying shed prior to cleaning.
Propagule Processing:	Seeds are cleaned using a hammermill and office clipper at NRCS. Seed longevity is up to 5 years at 3 to 5C in sealed containers. Seed dormancy is classified as physiological dormancy. Seeds/Kg: 14,000,000/kg % Purity: 100% % Germination: 92%
Pre-Planting Treatments:	60 day cold, moist stratification. Seeds are imbibed in water for 1 hour and are placed in fine mesh bags,buried in moist peat in ventilated containers. Seeds are stratified at 1 to 3C.
Growing Area Preparation/ Annual Practices for Perennial Crops:	Greenhouse and Outdoor nursery growing facility. Sowing Method: Direct Seeding. Seeds are lightly covered with medium. 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 172 ml conetainer.
Establishment Phase:	Medium is kept slightly moist during germination. Initial germination appeared uniform and was complete in 3 weeks. Seedlings are thinned and transplanted at the true leaf stage.
Length of Establishment Phase:	4 weeks
Active Growth Phase:	Root and shoot development occurs rapidly following germination. Seedlings have 4 to 6 true 2 months after germination. Seedlings are fertilized with 13-13-13 liquid NPK at 100 ppm fertilizer during the growing season.
Length of Active Growth Phase:	10 weeks
Hardening Phase:	Irrigation is gradually reduced in September and October. Plants are fertilized with 10-20-20 liquid NPK at 200 ppm fertilizer during early fall and leached with clear water before winterization.
Length of Hardening Phase:	4 weeks
Harvesting, Storage and Shipping:	Total Time to Harvest: 6.5 months Harvest Date: July Storage Conditions: Overwinter in outdoor nursery under insulating foam cover and snow.
Length of Storage:	5 months
Other Comments:	There are 3 botanical varieties: var. cylindrica, var. glabella, and var. alpina.
References:	Flora of the Pacific Northwest, Hitchcock and Cronquist, 7th edition, University of Washington Press, 1973. Seeding Rate Statistics for Native and Introduced Species, Hassell, Wendel, U.S.D.I. and U.S.D.A., April 1996. Seeds: Ecology, Biogeography, and Evolution of Dormancy and Germination, Baskin and Baskin, Academic Press, 1998. Seed Germination Theory and Practice, Deno, Norman, Penn State University, 1993. Glacier National Park Native Plant Nursery Propagation Records, unpublished. ÿ

Citation:

Lapp, Joyce; Evans, Jeff; Wick, Dale; Hosokawa, Joy. 2008. Propagation protocol for production of Container (plug) Heuchera cylindrica Dougl. plants 172 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.