SELECTION OF GROUNDCOVERS FOR LOW-INPUT LANDSCAPES IN TEMPERATE MEDITERRANEAN CLIMATES
Temperate Mediterranean climates occur at the northern and southern limit of this climate type. These regions feature cooler summers but colder winter tempera-tures than areas more traditionally considered Mediterranean. Plants selected for landscape use in these regions must possess sufficient cold hardiness to survive winter conditions. Development of lower-input landscapes in these regions will involve elimination of irrigation in order to reduce water use and expense as well as reducing weed problems. Use of appropriate groundcovers is an important component of these landscapes, and so for temperate Mediterranean climates, suitable groundcovers will be capable of growing satisfactorily with no summer irrigation and hardy enough to tolerate winter conditions. Western Oregon has a humid Mediterranean climate and several evaluations of Mediterranean genera have been undertaken to select ground-covers suited to local conditions. The evaluations have identified a number of hardy groundcovers suitable for landscape use, including Ceanothus thyrsiflorus var. griseus Kurt Zadnik, C. cuneatus var. rigidus Snowball, Cistus ×gardianus, C. ×obtusifolius and Halimium lasianthum Sandling. An evaluation of Arctostaphylos was planted in 2009 and cold hardiness results are described. A new evaluation of Grevillea will be planted in 2011.
Bell, N.C., Owen, J. and Altland, J. (2012). SELECTION OF GROUNDCOVERS FOR LOW-INPUT LANDSCAPES IN TEMPERATE MEDITERRANEAN CLIMATES. Acta Hortic. 937, 1033-1039
weed control, cold hardiness, Cistus, Ceanothus, Halimium, Arctostaphylos