I noticed reading Lee Reich's Landscaping with Fruit, that his entries include an AHS Heat Zone reference.
When I Google's AHS Heat Zone, I got no results. So obviously this is a secret that people gardening in dry or tropical heat areas should know about.
AHS stands for American Horticultural Society. And the zones refer to the USDA hardiness zones most people are familiar with. For example, most of Alabama where I live is in Zone 8. The zone is supposed to describe the kind of plants that can be grown within that area.
There is an explanation and link to the AHS Heat Zone map here: You can download the AHS Heat Zone map from this page.
http://www.gardeners.com/how-t...
Other American Horticultural Society Gardening Maps can be found here:
http://www.ahs.org/gardening-r...
HEAT ZONE MAP::
http://www.ahs.org/gardening-r...
