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The Forest Service National Center for Reforestation, Nurseries, and Genetic Resources (RNGR) is a leading source of technical information for nurseries and land managers regarding production and planting of trees and other native plants for reforestation, restoration, and conservation.

 
NPN Protocol Details Image

Sidalcea (hendersonii)

Amy Bartow
Seed and Plant Production Manager
USDA NRCS - Corvallis Plant Materials Center
3415 NE Granger Ave
Corvallis, Oregon 97330
(541) 757-4812 ext 103
(541) 757-4733 (fax)
amy.bartow@or.usda.gov
http://plant-materials.nrcs.usda.gov/orpmc
Family Scientific Name: Malvaceae
Family Common Name: mallow
Scientific Name: Sidalcea hendersonii
Common Name: Henderson's checkermallow
Species Code: SIHE
Ecotype: Coastal ecotype from Clatsop Co, OR
General Distribution: This plant is rare in general but usually grows along the coast in tidal marshes and meadows. Washington, Oregon and British Columbia have been known to have them each in ascending order of rarity.
Propagation Goal: plants
Propagation Method: seed
ProductType: Container (plug)
Stock Type: stubby containers
Time To Grow: Weeks
Target Specifications: Well-developed crowns, roots and rhizomes filling soil profile in container.
Pre-Planting Treatments: Our seeds germinated at higher percentages (60% vs. 25%) when they received cold(35F) treatments but seeds also germinated in the warm (75F) treatments. Seedlings in the warm treatments were moldy and seemed less vigorous. A short cold treatment followed by a 50-60F temperatures would probably be the best germination strategy for this species.

Citation:

2014. Propagation protocol for production of Container (plug) Sidalcea hendersonii plants stubby containers; USDA NRCS - Corvallis Plant Materials Center Corvallis, Oregon. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/02/23). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.