Department of agriculture plant zones 2 to 11, as long as summer temperatures remain warm enough for the duration of the plants development. * direct sow or transfer seedlings 2 weeks after any threat of frost has passed. · watermelons can be grown almost year-round, depending on the specific climate. These melons can be grown in u. s. · learn how to plant, grow, and harvest sweet, juicy watermelon in your garden—tips for starting seeds, caring for vines, and knowing when they’re ripe. · love watermelon but havent had any luck growing them in your northern region? Watermelons like hot, sunny sites. The recommended growing zones for watermelons in the united states are typically usda hardiness zones 3 to 9 , although specific varieties may have slightly different requirements. This makes growing watermelons in usda zone 5 quite a challenge, but not totally impossible. Learn more in this article. Zone 7 is also well-suited for their production. · watermelons are annual crops that can be grown from seed or watermelon seedlings. Watermelons are warm-season plants that thrive in regions with long, hot summers. Watermelons thrive best in zones 8 and 9 , which provide extended periods of warmth and sunshine for maturity. Beyond hardiness zones, several environmental factors influence watermelon growth and fruit production. Direct sowing works well in these zones , and you can often get multiple harvests in a single year. Use our zone -based planting guide to know when to plant watermelon.