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That's really big news if you consider 80 million Americans use this map to decide on what and when to grow! Simply put, the types of plants that are able to grow successfully has changed for 50 ...
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.
For practical purposes, Canada has adopted the American hardiness zone classification system. The 1990 version of the USDA Plant Hardiness Zone Map included Canada and Mexico, but they were removed with the 2012 update to focus on the United States and Puerto Rico. [8] The Canadian government publishes both Canadian and USDA-style zone maps. [37]
Acer palmatum is deciduous, with the growth habit of a shrub or small tree reaching heights of 6 to 10 m (20 to 33 ft), rarely 16 m (52 ft), reaching a mature width of 4.5 to 10 m (15 to 33 ft), [8] often growing as an understory plant in shady woodlands. It may have multiple trunks joining close to the ground.
An updated plant hardiness zone map released by the USDA last month shows nearly half of the country is now classified in a "warmer" zone than it used to be. That includes parts of Southeastern N.C.
Acer japonicum is a small deciduous tree growing to 5–10 m (rarely 15 m) tall, with a trunk up to 40 cm in diameter. The bark is smooth on young trees, becoming rough and scaly on old trees. The shoots are slender, and thinly downy with whitish hairs.
Most maples or acers are trees growing to a height of 10–45 m (33–148 ft). Others are shrubs less than 10 meters tall with a number of small trunks originating at about ground level. Most species are deciduous , and many are renowned for their autumn leaf colours , but a few in southern Asia and the Mediterranean region are mostly evergreen .
Japanese maples grow at a slow to moderate rate of 1 to 2 feet per year. For more Better Homes & Gardens news, make sure to sign up for our newsletter! Read the original article on Better Homes ...