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The vegetable growing seasons in the USA vary depending on the region and climate. In general, most regions have a warm season (spring through fall) and a cool season (fall through spring). Warm season vegetables like tomatoes, peppers, and squash are planted after the last frost in spring and harvested before the first fall frost. Cool season crops like lettuce, spinach, and broccoli can be grown in early spring or late fall when temperatures are milder. Check the [USDA Plant Hardiness Zone Map](https://planthardiness.ars.usda.gov/PHZMWeb/) for your area to determine the best planting times.