Looking at the zone map, we see most of Orleans Parish is in Zone 8. But anyone who lives here knows that it is unusual, certainly not average, for winter temperatures to drop below 20 degrees.

The Heat Zone Map can be ordered by contacting the American Horticultural Society at 7931 East Boulevard Drive, Alexandria, Va. 22308-1300, or through their website at www.ahs.org or by phone at 1 ...

Its direct kin is the U.S. Department of Agriculture’s Plant Hardiness Zone Map, which tells you what plants will ”winter over” in your garden. Developed in 1960 and updated in 1990, that ...

In 1997, the American Horticultural Society released its Plant Heat Zone Map. It defines 12 zones, with divisions based on differences in annual average number of "heat" days - those above 86 degrees.

The 2023 map is about 2.5 degrees warmer than the 2012 map, translating into about half of the country shifting to a warmer zone. The new Plant Hardiness Zone Map.

Most avid gardeners know the USDA Plant Hardiness Zone Map, based on the average annual extreme minimum temperature, changed this past January, adding two new zones: 12 and 13, which mostly apply ...

The American Horticultural Society developed its Heat Zone Map to provide information about plant response to heat. This map's 12 zones indicate the average number of days each year on which a ...

In 1997, the American Horticultural Society released the Plant Heat-Zone Map. This was a revolutionary idea coordinated by Dr. H. Marc Cathey, president emeritus of the society.

So, the new map shows us in Zone 7B instead of Zone 7A – a difference of 5 degrees. Most of the country shifted in this manner with the warming trend showing a plus 3.2 degrees overall.

Things to Do New Plant Hardiness Zone map released An updated USDA Hardiness Zone Map was released Jan. 26, 2012. Credit: U.S.D.A.

The 2012 USDA Plant Hardiness Zone Map (PHZM) allows gardeners and growers to assess which plants are most likely to thrive at any given location, as well as view warming trends across various U.S ...