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

Asclepias (speciosa)

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: Asclepiadaceae
Family Common Name: milkweed
Scientific Name: Asclepias speciosa Torrey
Common Name: showy milkweed
Species Code: ASSP
Ecotype: seeds were collected in Lane Co. near Eugene, Oregon
Propagation Goal: plants
Propagation Method: seed
ProductType: Container (plug)
Stock Type: plugs
Time To Grow: 5 Months
Target Specifications: root-mass filling the container
Propagule Collection: Seed pods were clipped from plants when ripe (splitting) and were left in paper bags to dry.
Propagule Processing: Seeds were cleaned usinga brush machine (with a sandpaper drum) to remove pappas. Seeds were then run through an air screen machine.
Growing Area Preparation/
Annual Practices for Perennial Crops:		 Seeds were planted in spring into cone-tainers using Sunshine #1 (a soil-less peat-based media amended with micro-nutrients and a slow release fertilzer)and placed in a greenhouse under moderate conditions (70 degree days, 50 degree nights).
Establishment Phase: Seeds germinated within one to two weeks. 80% germination was observed.
Length of Establishment Phase: 1 month
Active Growth Phase: Plants were hand-watered daily and moved to a shadehouse in early summer. They were fertilized twice durring the growing season with Peters 20-20-20.
Length of Active Growth Phase: 4 months
Hardening Phase: Plants went dormant in late summer and re-emerged in October.

Citation:

Bartow, Amy L. 2006. Propagation protocol for production of Container (plug) Asclepias speciosa Torrey plants plugs; USDA NRCS - Corvallis Plant Materials Center Corvallis, Oregon. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/07/01). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.