Windham is a new winter pea that was developed in the Northwest as a joing venture between the USDA_ARS and three universities in Idaho, Washington, and Montana. Before being released, Windham was tested at 29 site-years over 8 yr in eastern Washington, northern Idaho, Oregon, central Montana, North Dakota, South Dakota, and Wyoming.
Windham is recognized as having improved winter hardiness. Windham has a dwarf growth habit and an upright canopy. Windham had a winter survival of 100% in a 2004 Wyoming trial and in 2004/2006 in the Pacific Northwest. Both years were considered "harsh winters" where less winter hardy entries were killed.