Gardening Plant Encyclopedia Vegetable Sweet Potato By Viveka Neveln Viveka Neveln Instagram Viveka Neveln is the Garden Editor at BHG and a degreed horticulturist with broad gardening expertise earned over 3+ decades of practice and study. She has more than 20 years of experience writing and editing for both print and digital media. Learn about BHG's Editorial Process Updated on February 1, 2017 Share Tweet Pin Email Sweet potatoes are undergoing a renaissance. Once a sticky, frumpy food eaten only at Thanksgiving, a renewed appreciation for this root vegetable's powerful nutritional value has made it popular once again. Go ahead and mash sweet potatoes with maple syrup or use them in a marshmallow-studded casserole, but also try baking them like regular potatoes or cutting them into strips, tossing it with oil, and roasting at a high heat for sweet potato oven fries. The fleshy roots of sweet potato are often mistakenly called yams, which are a different tropical root crop. Sweet potatoes require a long, warm growing season to mature — which is why they've been a Southern favorite. Plant slips (sprouts) of sweet potatoes after spring weather has warmed and all danger of frost has passed. In cool-summer areas, plant the slips through slits in black plastic mulch, which will warm the soil and speed development. Sweet Potato Overview Genus Name Ipomoea batatas Common Name Sweet Potato Plant Type Vegetable Light Sun Height 1 to 3 feet Width 12 to 48 inches Propagation Leaf Cuttings, Stem Cuttings Harvesting Sweet Potato Harvest sweet potato vines 90 to 110 days after planting, or after the vines have been lightly frosted. With a garden fork, carefully dig the vines and separate the roots. Cure harvested sweet potatoes in high humidity at 80 to 90 degrees F for one or two weeks. Move the roots to a dry location at 55 to 60 degrees F for storage. Flavor will improve after several weeks of storage as starches in the roots convert to sugar. Was this page helpful? Thanks for your feedback! Tell us why! Other Submit