Scientific Name: Elymus repens ssp. repens ( syn. Agropyron repens )
Common Name: quackgrass, couchgrass
Family Name: Poaceae
Origin: Central / west Asia, Europe
Hardiness Zone: Zone 3: (-40 to -34 °C)
Plant Type: Herbaceous perennial, Invasive plant, Poales (grass-like), Weed (horticultural)
Mature Size: 0.7 - 1.3m x 0.3 - 0.6m (height x width)
Habit: Spreading, Upright
Form: Vase
Texture: Medium - fine
Landscape Uses: Erosion control
Exposure: Full sun, Part sun/part shade
Soil or Media: Well-drained
Leaves: Grass-like, Alternate, Soft flexible, Glabrous, Linear, Entire
Flowers: Spikelet, Green-yellow, Jun-Jul-Aug
Fruit: Grain (caryopsis), Brown
Key ID Features:
Stems (culms) 40-150cm tall; rhizomes long, aggressive, sharp-pointed with yellowish tips; leaves linear, 15-40cm long and 3-10mm broad at the base of the plant, with leaves higher on the stems 2-8mm broad, vernation rolled, blade rough on the upper surface, not glossy, auricles 1mm long, slender and overlapping to clasp the culm, ligule 0.5-1mm long, sheath not compressed, base with trichomes; flower spike 10-30cm long, spikelets 1–2cm long, 5-7mm broad and 3mm thick with three to eight florets, glumes 7-12mm long, usually without an awn or with only a short one. <a href ='' target='_blank'>Wikipedia</a>