Oat season depends on the country's geographic location, climate, and oat variety.
There are two popular oat varieties, the cool-season oats ( the general one ) and the winter oats. Spring and summer are the best time to plant and harvest cool-season oats. Late summer and early spring are for the winter oats. This variety tends to be cultivated longer as they are overwintered in milder areas.
Typically, spring is the planting season of oat and summer is the harvesting season. Areas with milder climates can plant oats in the fall and harvest them in spring.
In the United States, the oat season is from early spring to summer. Farmers prepare their fields in late winter, grow oats in early spring, between March and April, and harvest them in late summer.
Overall, oat cultivation and production are highly reliant on the country's location and growing conditions.