About half of the country moved into a slightly warmer zone in the Agriculture Department’s new “plant hardiness” map, an important guide for gardeners. Climate change may be a factor.
I’m a bit disappointed in the USDA’s approach here. Basing the model on historical data, the map is already out of date at the time of its release. Right now the difference will be small, but by the time we get close to the next update, the difference could be considerable.
I’m a bit disappointed in the USDA’s approach here. Basing the model on historical data, the map is already out of date at the time of its release. Right now the difference will be small, but by the time we get close to the next update, the difference could be considerable.