The best time to plant sweet potato plants is after the ground is thawed and after the last spring frost date has passed. If the ground doesn't freeze in your location, then the best time to plant is usually a month after your last spring frost date.
How long do sweet potatoes take to grow?
You can harvest sweet potatoes as soon as they reach a usable size, which takes at least three months. Harvest a few tubers to see if they're large enough before digging the entire patch. Plan to dig all sweet potatoes before frost.
Can you plant sweet potatoes in summer?
Because of the warmth required in the soil, you should start sweet potatoes about mid-summer. Otherwise, the soil won't be warm enough for these plants to grow. From the moment you plant the slips, it takes only six weeks for the sweet potatoes to be ready. Plant the slips 12 to 18 inches (30-46 cm.)
Can you leave sweet potatoes in the ground over winter?
If you can't get the roots dug right after a frost, cut the killed tops off just above the soil line, and you can then leave the roots in the ground for a few days. Take care when harvesting, as the sweet potato roots can be damaged very easily.
More useful articles on a similar topic 👇
Can I plant sweet potatoes now?Can sweet potatoes be grown in the UK?