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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

Phlox (gracilis)

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: Polemoniaceae
Family Common Name: Phlox family
Scientific Name: Phlox gracilis E. Greene
Common Synonym: Microsteris gracilis
Common Name: slender phlox
Species Code: MIGR
Ecotype: seeds were collected in Lane Co., Oregon near Eugene
Propagation Goal: plants
Propagation Method: seed
ProductType: Container (plug)
Time To Grow: 0
Target Specifications: Grow plugs to be transplanted into a field covered with weed fabric for seed increase.
Propagule Collection: Pods were allowed to split on the weed fabric and drop seed. The weed fabric was vacuumed using small battery-powered hand vacuums to collect seed that had shattered. If the weed fabric gets wet, these seeds will glue themselves to the fabric (we make sure to vaccum before any summer rains).
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 flatsof cone-tainers were covered with poly-ethylene bags and placed in a walk-in cooler (35-40 degrees) for 2 weeks.
Growing Area Preparation/
Annual Practices for Perennial Crops:		 Flats were removed from the cooler after 2 weeks and placed in greenhouse set at moderate temperatures (70 degree days/50 degree nights.)
Establishment Phase: Seeds germinated within one to two weeks. 85% germination occured.
Other Comments: Seeds are sown in containers and left outside in December for four weeks, then moved to a minimally heated greenhouse (about 50 degrees). Plugs are ready to be transplanted outside in mid march.

Citation:

Bartow, Amy. 2007. Propagation protocol for production of Container (plug) Phlox gracilis E. Greene plants USDA NRCS - Corvallis Plant Materials Center Corvallis, Oregon. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/02/24). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.