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As an example, Quebec City in Canada is located in zone 4, but can rely on a significant snow cover every year, making it possible to cultivate plants normally rated for zones 5 or 6. But, in Montreal, located to the southwest in zone 5, it is sometimes difficult to cultivate plants adapted to the zone because of the unreliable snow cover.
Tender plants are those killed by freezing temperatures, while hardy plants survive freezing—at least down to certain temperatures, depending on the plant. "Half-hardy" is a term used sometimes in horticulture to describe bedding plants which are sown in heat in winter or early spring, and planted outside after all danger of frost has passed.
It is commonly grown as an ornamental plant in warm temperate regions where winters do not fall below about −15 °C (5 °F). [4] F. japonica thrives in semi-shade to full-shade and is winter hardy in USDA Zones 8–10. [5] It can be grown as an indoor plant and has been shown to effectively remove gaseous formaldehyde from indoor air. [4]
The plants are long-lived perennials that are winter hardy in USDA Zones 3 to 8 and recommended for heat zones 8 to 1. [15] Though Hosta plantaginea originates in China, most of the species that provide the modern plants were introduced from Japan to Europe by Philipp Franz von Siebold in the mid-19th century originating from shady locations ...
Alpine level: [7] [20] The zone that stretches between the tree line and snowline. This zone is further broken down into Sub-Nival and Treeless Alpine (in the tropics-Tierra fria; low-alpine) Sub-nival: [20] The highest zone that vegetation typically exists. This area is shaped by the frequent frosts that restrict extensive plant colonization.
Class 8. Chersophytes (of formations on waste land). D. The climate is very dry and decides the character of the vegetation; the properties of the soil are dominated by climate; the formations are also xerophilous: Class 9. Eremophytes (of formations on desert and steppe). Class 10. Psilophytes (of formations on savannah). Class 11.
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Holdridge life zone classification scheme. Although conceived as three-dimensional by its originator, it is usually shown as a two-dimensional array of hexagons in a triangular frame. The Holdridge life zones system is a global bioclimatic scheme for the classification of land areas.