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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

Polemonium (pulcherrimum)

Alaska Plant Materials Center
Alaska Plant Materials Center
5310 S. Bodenburg Spur Rd.
Palmer, Alaska 99645
907-745-4469
907-746-1568 (fax)
Don.Ross@alaska.gov
http://www.plants.alaska.gov/

Family Scientific Name: Polemoniaceae
Family Common Name: Polemonium
Scientific Name: Polemonium pulcherrimum Hook
Common Name: Dwarf Jacob's Ladder
Ecotype: Dry, gravelly areas in South-Central Alaska
Propagation Goal: plants
Propagation Method: seed
ProductType: Container (plug)
Time To Grow: 0
Target Specifications: Root trainer, 10.5 cu.in./cell. Multiple leaves, firm root plug.
Propagule Collection: Seeds collected by hand when grayish capsules start opening - approximately July/August. Seed is red brown/black when ripe.
Propagule Processing: Air dry. Approximately 900 seeds per gram with a Tetrazolium test of 90+% viable seed. Clean seed with brush cleaner, hand screening, and air. Store in freezer.
Pre-Planting Treatments: None.
Growing Area Preparation/
Annual Practices for Perennial Crops:
Soil mix: Upland, well drained. Plant 1 seed per cell. Initial propagation site in greenhouse.
Establishment Phase: Seeds germinate approximately 10 days after sowing. Plants moved to lathhouse to harden off after last frost. Fertilize minimally after true leaves appear.
Length of Establishment Phase: Two months
References: Hulten, Eric. 1968. Flora of Alaska and Neighboring Territories. Stanford University Press. 1008 pp.

Citation:

Moore, Nancy J.; Hunt, Peggy. 2006. Propagation protocol for production of Container (plug) Polemonium pulcherrimum Hook plants Alaska Plant Materials Center Palmer, Alaska. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/07/02). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.