Perideridia (gairdneri)

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

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Family Scientific Name:	Apiaceae
Family Common Name:	Carrot family
Scientific Name:	Perideridia gairdneri Hook. & Arn
Common Name:	Gairdner's yampah
Species Code:	PEGA3
Ecotype:	seeds were collected in Lane Co., Oregon near Eugene
Propagation Goal:	plants
Propagation Method:	seed
ProductType:	Container (plug)
Time To Grow:	0
Pre-Planting Treatments:	Seeds were sown directly into cone-tainers filled with Sunshine#1 (a soil-less peat-based media) amended with micro-nutrients (Micro-max) and a slow-release fertilizer (Osmocote 14-14-14). Flats of cone-tainers were covered with poly-ethylene bags and placed in a walk-in cooler (35-40 degrees). Seedlings emerged after 80 days. 80% germination was observed.
Growing Area Preparation/ Annual Practices for Perennial Crops:	When seedlings emerged, flats were removed from the cooler and placed in a greenhouse set at moderate temperatures (70 degree day/ 50 degree nights).
Establishment Phase:	Seedlings germinated within one to two weeks after coming out of the cooler.
Other Comments:	Trials were also conducted with no cold-moist stratification which resulted in zero germination, 6 weeks cold-moiststratification resulted in fair germination 40%. 80-90 days cold-moist stratification is optimum.

Citation:

Bartow, Amy L. 2003. Propagation protocol for production of Container (plug) Perideridia gairdneri Hook. & Arn plants USDA NRCS - Corvallis Plant Materials Center Corvallis, Oregon. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/10/29). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.