Coefficient of Conservatism; C values range from 0 - 10, and represent the estimated probability that a native plant is likely to occur in a remnant natural plant community (applies to Chicago area native plants).
A collaborative plant introduction program consisting of partnerships between Chicago Botanic Garden, The Morton Arboretum, and the Ornamental Grower’s Association of Northern Illinois (OGA), designed to develop and promote the use of new plant cultivars that are well-adapted to the growing conditions of the Upper Midwest
The US Department of Agriculture has divided the country into regions based on average low winter temperatures. Plants are assigned to hardiness zones based on the lowest temperature the plant can tolerate before cellular damage occurs.
Typically, a non-native plant that competes with native plants for water, nutrients and space, destroying the natural habitat and ecosystem of native species in the process; (Different from aggressive; see definition for aggressive).
A layer of material, such as woodchips or compost, that is applied on the soil surface to retain soil moisture and moderate soil temperature extremes; if organic, it will break down to improve soil structure and fertility