Main Page | See live article | Alphabetical index In agriculture, the growing season is the period of each year when crops can be grown. It is usually determined by climate and crop selection. Depending on the location, temperature, daylight hours, and rainfall, may all be critical factors. In the US and Canada, the growing season usually means the days between last and first frost, or last and first 32°F (freezing) lows. This is roughly May to October. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.