RNGR.net is sponsored by the USDA Forest Service and Southern Regional Extension Forestry and is a colloborative effort between these two agencies.

U.S. Department of Agriculture USDA Forest Service Southern Regional Extension Forestry Southern Regional Extension Forestry

Skip to content. | Skip to navigation

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

Clethra (alnifolia)

Jill Barbour
Germination Specialist
USDA FS - National Seed Laboratory
5675 Riggins Mill Rd.
Dry Branch, Georgia 31020
478-751-3553
478-751-4135 (fax)
jbarbour@fs.fed.us
www.nsl.fs.fed.us
Family Scientific Name: Clethraceae
Family Common Name: Sweet-pepperbush
Scientific Name: Clethra alnifolia L.
Common Name: pink-spire
Propagation Goal: seeds
Propagation Method: seed
ProductType: Propagules (seeds, cuttings, poles, etc.)
Stock Type: seed cleaning techniques
Time To Grow: 0
Propagule Processing: Seed cleaning. One seedlot was run twice through the Westrup Brush Machine at speed 11. Medium stiff brushes and a coarse shell(size 10) were used. No aspiration was performed. A 6 x 32 inch square hole screen was used to remove small trash.
Other Comments: purity 7.41%
sd/lb 6,434,000
germination 64%

Citation:

Barbour, Jill R. 2007. Propagation protocol for production of Propagules (seeds, cuttings, poles, etc.) Clethra alnifolia L. seeds seed cleaning techniques; USDA FS - National Seed Laboratory Dry Branch, Georgia. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/04/25). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.