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What happens if you leave sweet potatoes in the ground over winter?

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After a hard frost, a sweet potato vine (Ipomoea batatas) usually look like something the cat left out in the rain, limp, rotten and dead, but as long as the roots survive it will come back in the spring. Sweet potato vine grows as a perennial in U.S. Department of Agriculture plant hardiness zones 9 through 11. 17 дек. 2018 г.


Can sweet potatoes be left in the ground over winter?

Sweet potatoes will continue to grow, as long as soil temperatures on average remain above 65 degrees (F), or tops are killed by frost. You can check soil temperatures with an expensive thermometer for soils or compost, available at many complete garden supply stores or online (good to have around the garden anyway).

What happens if you leave sweet potatoes in the ground too long?

Sweet potato roots continue to grow until frost kills the vines. Roots can be left in the ground for a short while; however, a hard frost can cause damage to roots near the surface. Chilling injury also results to roots when soil temperatures drop to 50°F or lower, and this can result in internal decay in storage.

How long can sweet potatoes be left in the ground?

Freezing temperatures won't damage them unless they're near the surface of the soil. If a frost hits and you dig them up quickly, they'll store as well as if you had dug them before the frost. The Old Farmer's Almanac reports that most sweet potato varieties are ready for harvest about 100 days after planting.

What do you do with sweet potato plants in the winter?

To overwinter the tubers, cut the vines to ground level, then dig them up before the first frost in autumn. Dig carefully and be careful not to slice into the tubers. Brush the soil lightly off the tubers, then store them, not touching, in a cardboard box filled with peat moss, sand, or vermiculite.

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