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

Castilleja (tenuis)

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: Scrophulariaceae
Family Common Name: indian paintbrush, owl's clover family
Scientific Name: Castilleja tenuis (A.A. Heller) Chuang & Heckard
Common Synonym: Orthocarpus hispidis
Common Name: hairy owl's clover
Species Code: CATE26
Ecotype: Seeds were collected in Lane Co. near Eugene.
Propagation Goal: plants
Propagation Method: seed
ProductType: Container (plug)
Time To Grow: 0
Propagule Collection: Seed pods are clipped from plant when they begin to turn black and split.
Propagule Processing: Seeds are cleaned using an air screen machine.
Pre-Planting Treatments: Seeds were sown into cone-tainers filled with Sunshine #1 (a soil-less peat-based media) amended with micro-nutrients (Micromax) and a slow release fertilizer (Osmocote 14-14-14). The flats of cone-tainers were covered with poly-ethylene bags and placed in a walk-in cooler (35-40 degrees) for 90 days.
Growing Area Preparation/
Annual Practices for Perennial Crops:		 Flats were removed from the cooler after 90 days and placed in a greenhouse set at moderate temperatures (70 degrees days/50 degrees nights).
Other Comments: One flat of cone-tainers sown with seeds ("control flat") was placed in the greenhouse without any cold-moist stratification. No seeds germinated. Flats placed in cooler 90 days resulted in 50% germination.

Citation:

Bartow, Amy L. 2003. Propagation protocol for production of Container (plug) Castilleja tenuis (A.A. Heller) Chuang & Heckard plants USDA NRCS - Corvallis Plant Materials Center Corvallis, Oregon. 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.