Hardiness zone



A hardiness zone (a subcategory of Vertical Zonation) is a geographically defined area in which a specific category of plant life is capable of growing, as defined by climatic conditions, including its ability to withstand the minimum temperatures of the zone.

For example, a plant that is described as "hardy to zone 10" means that the plant can withstand a minimum temperature of -1°C. A more resilient plant that is "hardy to zone 9" can tolerate a minimum temperature of -7°C.

WikiGardener
WikiGardener uses the hardiness zone scale to indicate where a plant grows best outdoors. It is entirely possible to grow plants outside of the advised zones. With the correct equipment a plant could be grown in controlled conditions in any environment.