North America
In the United States and Canada, the growing season usually means the days between last and first frost, or approximately the last and first occurrence of 0° C (freezing) overnight low temperature.
In the northern regions this is roughly May to October, in southern-southwestern-Californian regions it is roughly March to November or longer. Proximity to maritime of extremes can extend the growing season.
Read more about this topic: Growing Season
Famous quotes related to north america:
“I knew that the wall was the main thing in Quebec, and had cost a great deal of money.... In fact, these are the only remarkable walls we have in North America, though we have a good deal of Virginia fence, it is true.”
—Henry David Thoreau (1817–1862)