Native to the tropical regions of the Americas, sweet potato vines are hardy in U.S. Department of Agriculture plant hardiness zones 8 through 11, depending on the variety. While the vines die back in cold weather, in frost-free climates the tubers should survive the winter and sprout new vines in the spring.
Can you grow sweet potatoes all year round?
They will take about 16 to 18 weeks to mature in warm weather, longer in cooler weather. That way you can grow sweet potatoes all year round, and you don't find yourself with a big pile of them all at once.
What temperature is too cold for sweet potatoes?
It's important not to bruise the roots, or to leave them exposed to temperatures higher than 90°F (32°C) for more than half an hour, or they will get sun-scald. Below 55°F (13°C), they'll get chilling injury.
What seasons do sweet potatoes grow?
Sweet potatoes require a long, warm growing season, usually about 4 months of frost-free weather to reach harvest. Set sweet potato starts or slips in the garden after all danger of frost has passed, usually 4 weeks after the last average frost date in early summer.
What happens if you leave sweet potatoes in the ground over winter?
Staying Alive Underground Soil acts as an insulator, so even if the water in the birdbath freezes, your sweet potato vine will winter over within the hardiness zone range. Freezing weather will, however, kill the foliage back to the soil line. In late winter or early spring, cut down the dead stalks.
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