Poa

Mark E. Majerus USDA NRCS - Bridger Plant Materials Center 99 South River Road, Rte. 2, Box 1189 Bridger, Montana 59014-9718 (406) 662-3579 (406) 662-3428 (fax) mmajerus@mt.nrcs.usda.gov http://plant-materials.nrcs.usda.gov/mtpmc

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Family Scientific Name:	Poaceae
Family Common Name:	Grass
Scientific Name:	Poa
Common Name:	Bluegrass
Species Code:	POA
Ecotype:	See
General Distribution:	Bluegrass is distributed across North America and grows in a wide range of climactic and edaphic conditions.
Propagation Goal:	seeds
Propagation Method:	seed
ProductType:	Propagules (seeds, cuttings, poles, etc.)
Time To Grow:	0
Target Specifications:	Harvest yields vary due to weather and age of stand. Average annual production is 7 kg/ha (6 lbs/ac).
Propagule Collection:	Wildland collection occurs early to late August when caryopsis are medium brown, at the hard dough stage, and not yet shattering (natural dispersal) from the panicle; easily hand-harvested. One collection hour/person will yield an average 55 grams (2 oz) clean seed, with stand density the critical variable affecting collection rate.
Propagule Processing:	Seed Processing: Seed is spread out on a tarp in a dry, sheltered environment and tuned daily for approximately 3-5 days, until no moisture or warmth is detected. After drying, material is processed with a Wintersteiger plot combine at concave closed, speed 700 rpm, and no wind. Seed is threshed with a hammermill through a 4/63" round hole screen, and air-screen processed on a Clipper M2B or Eclipse cleaner over a 1-18" round hole screen. Due to tiny seed, presence of persistent palea and lemma, and reasonable seed flow, this species is moderately easy to clean. Larger seed lots are processed most efficiently with mechanized cleaning equipment and smaller seed lots usually require more hand labor. Purity: 100%.
Pre-Planting Treatments:	Seed Treatments: None required.
Growing Area Preparation/ Annual Practices for Perennial Crops:	Propagation Environment: Seedbed is firm and free of weeds with good field moisture to 4" depth. Seed Propagation Method: Direct seeding.
Establishment Phase:	Sowing Date: Spring or dormant fall. Sowing/Planting Technique: 25-30 pure live seed/ft (0.3 m) row, irrigated 91 cm (36 in) row spacing, seeded with 2-row double-disk planter with depth bands, optimum seeding depth 0.6 cm (0.25 in). Establishment Phase: Soil surface is kept moist throughout the 14 day germination and emergence period (also helps prevent soil crusting); lower rates of Buctrylr or bromoxynil are applied at 3-5 leaf stage to controlbroadleaf weeds. Fertilizer application is not recommended the first year, as it generally stimulates weed growth and competition.
Length of Establishment Phase:	2 growing seasons.
Active Growth Phase:	Rapid Growth Phase: Spring to fall; broadleaf weed control with herbicides must occur prior to boot stage; soil moisture is critical during boot stage, milk stage of seed development, and post harvest to pre-freezup - no irrigation is applied during flowering (pollination); fertilizer is broadcast at 100 lbs actual N/40 lbs actual P/acre in mid-September.
Length of Active Growth Phase:	2 to 3 growing seasons.
Hardening Phase:	N/A.
Harvesting, Storage and Shipping:	Harvest Date: Cultivated harvest occurs late June to early July, with a mean harvest date of June 30 at the Bridger Plant Materials Center. A John Deer swather is used to cut stems into windrows for direct combining, or, to minimuze seed loss, a temporary "diaper" - a heavy piece of plastic or canvas clipped under belt draper - is attached for direct catchment. Seed Storage: Seed is placed in plastic seed bags and stored in a cool, dry environment. Seed Dormancy: Classified as physiological dormancy.
Length of Storage:	<b>Storage Duration:</b> 5 to 7 years.
Other Comments:	Ecotype: 1 Yellowstone National Park accession periodically collected and produced from 1990 to 1994. Ecological zone is big sagebrush/Idaho fescue grassland. Elevation is 2,539 m (8,330 ft).
References:	Manual of the grasses of the United States, A.S. Hitchcock, Second Edition, Two Volumes, Dover Publications, Inc., 1970. Flora of the Pacific Northwest, C.L. Hitchcock and A. Cronquist, University of Washington Press, 1973. Montana Interagency Plant Materials Handbook, Montana State University, Extension Service Bulletin EB 69, June 1990. Yellowstone Vegetation - Consequences of Environment and History in a Natural Setting, Don G. Despain, Roberts Reinhart Publishers, 1990. Seeds: Ecology, Biogeography, and Evolution of Dormancy and Germination, C.C. Baskin and J.M. Basking, Academic Press, 2001.

Citation:

Winslow, Susan R.. 2002. Propagation protocol for production of Propagules (seeds, cuttings, poles, etc.) Poa seeds USDA NRCS - Bridger Plant Materials Center Bridger, Montana. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/07/23). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.