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A hardiness zone is a geographic area defined as having a certain average annual minimum temperature, a factor relevant to the survival of many plants. In some systems other statistics are included in the calculations. The original and most widely used system, developed by the United States Department of Agriculture (USDA) as a rough guide for ...
The old 2012 map, seen here, isn't as detailed or regional as the new plant hardiness map, in large part to the 2023 map including data from many more weather stations.
According to the new map released in November 2023, about half of the United States has shifted to a new hardiness zone. That's really big news if you consider 80 million Americans use this map to ...
Kudzu smothering trees in Atlanta, Georgia. A woodland area of Brooklyn, New York, blanketed by kudzu. Kudzu is an invasive plant species in the United States, introduced from Asia with devastating environmental consequences, [ 1] earning it the nickname "the vine that ate the South". It has been spreading rapidly in the Southern United States ...
For example, Seattle, Washington, and the city of Austin, Texas, are both in the USDA hardiness zone 9a because the map is a measure of the coldest temperature a plant can handle.
The arctic forest–tundra transition zone in northwestern Canada varies in width, perhaps averaging 145 kilometres (90 mi) and widening markedly from west to east, [22] in contrast with the telescoped alpine timberlines. [16] North of the arctic tree line lies the low-growing tundra, and southwards lies the boreal forest.
Camellia sinensis, the source of tea leaves and buds, can be grown in much of the United States. Commercial cultivation has been tried at various times and locations since the 1700s, but tea has remained a niche crop and has never been cultivated widely in the US. As of 2020, the US mainland has one relatively large plantation with full ...
American ginseng ( Panax quinquefolius) is a species of flowering plant in the ivy family Araliaceae. It is native to eastern North America and introduced in China. The specific epithet quinquefolius means "five-leaved", which refers to the typical number of leaflets per leaf. It is one of a group of taxa known as "ginseng".
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