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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

Arabis platysperma

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: Brassicaceae
Family Common Name: Mustard family
Scientific Name: Arabis platysperma Gray var. howellii (S. Wats.) Jepson
Common Name: Howell's pioneer rockcress
Species Code: ARPLH2
Ecotype: Seeds were collected from Crater Lake National Park.
Propagation Goal: plants
Propagation Method: seed
ProductType: Container (plug)
Time To Grow: 0
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.) Trays of conetainers were covered with polyethlyene bags and placed in a walk-in coller for 5,10, and 16 weeks. Within one week of being removed from a 5-week cold-moist stratification, seedlings emerged. They exhibited excellent vigor and germination was estimated at 96%. No significant difference in emergence or seedling vigor were noted between 5, 10 or 16 week stratified seeds. 2% germination was observed in control flats (no cold-moist stratification) after 4 weeks and seedlings were less vigorous than stratified ones.
Other Comments: Most plants flowered durring the first year, while still in containers.

Citation:

Bartow, Amy L. 2006. Propagation protocol for production of Container (plug) Arabis platysperma Gray var. howellii (S. Wats.) Jepson plants 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.