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Idaho Bentgrass
Agrostis idahoensis

About Idaho Bentgrass (Agrostis idahoensis) Agrostis idahoensis is a species of grass known by the common name Idaho bent grass. It is native to western North America from Alaska to California to Colorado, where it grows in several habitat types. It is a perennial grass growing in short tufts up to 30 centimeters tall. The leaves are thready and a few centimeters long. The flower cluster is an open, thin array of wispy branches bearing spikelets each a few millimeters long.
Plant Description
Plant Type

Max. Height
1 - 1.4 ft (0.3 - 0.43 m)


Growth Rate

Flower Color

Flowering Season

Native Status

Natural Setting
Site Type
Open meadows

Sun, Part Shade

Elevation ?
10' - 13317'

Annual Precip. ?
5.8" - 125.9"

Summer Precip. ?
0.30" - 4.13"

Coldest Month ?
18.7° F - 52.0° F

Hottest Month ?
37.2° F - 79.3° F

Humidity ?
0.68 vpd - 30.16 vpd

Soil Description
Prefers sandy or loamy soils. Does not grow well in clay soils.

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Idaho Bent Grass, Idaho Redtop

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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