‘O’Henry’ and ‘White Yam’ are high yielding, white-fleshed varieties. Sweet potato slips can be purchased from online garden sources, local garden centers or hardware stores. He suggested postponing taste tests until December. Grube recommends ‘Beauregard’ and ‘Covington’; recommends with reservations ‘White Yam,’ ‘O’Henry,’ ‘Japanese,’ ‘Georgia Jet,’ ‘Vardaman’ and ‘Carolina Ruby’; and does not recommend ‘Centennial,’ ‘Nancy Hall,’ ‘Bush Porto Rico,’ ‘Darby,’ ‘Tainung 65’ and ‘Hernandez,’ because they either didn’t produce sizeable roots or produced very few extremely large roots. This is why methods for growing sweet potatoes and Irish potatoes are very different. Soil Requirements. Voles love sweet potatoes. Grube suggested rotating away from sweet potatoes for two years to minimize scurf. Guzzi doesn’t wash his until after they’ve cured. If they do start spreading, lift the vines off the ground to prevent them rooting. Potatoes are actually the tubers that grow on roots running laterally 10 to 18 inches, and downward to about three feet below the potato plant. How can the vining crop be grown in space-saving ways? Because they grow on the lightest soil at his farm, mud isn’t caked to them. Snell planted hers under black plastic at 1 foot spacing, poking them in with a water wheel transplanter. ‘White Yam’ sweet potatoes yielded well but did poorly in taste tests, although some people like the starchier taste of this variety; and it may sweeten somewhat during storage. When to harvest sweet potatoes When growing new potatoes, keep in mind that the majority of the spuds will be … To create the perfect environment, create long, wide, 10-inch-high ridges spaced 3½ feet apart. “People either love it or hate it,” said Grube. Seed potatoes were set to ‘chit’ or sprout, placed with ‘eyes’ at the top in egg boxes, indoors on a cool windowsill at the end of February, to start the growing process. ‘Covington’ sweet potato is replacing ‘Beauregard’ as the commercial cultivar of choice. Find one at least 40 - 50 cm deep with holes in the bottom for drainage. Sweet potatoes, Ipomoea batatas. Wireworms (click beetle larvae) can be a problem following sod. Grube grew sweet potatoes on raised beds (because the soil was poorly drained) under 4-foot-wide black plastic underlain with drip tape. Here’s your guide on how to grow sweet potatoes at home. Email: [email protected], Physical Address: These tropical plants are very sensitive to chilling and grow best if the soil temperature is above 65 degrees F. before planting. Growing sweet potatoes — a great storage crop for those looking to be food self-sufficient — is simple in many climates if you follow our tips. Check that the slips are leafy and over 3 inches (7.6 cm) tall. This variety might do well in a long, dry season. Pests She grew a crop under black Biotelo in 2007, intercropping with mowed ryegrass and white clover. Mission: The Maine Organic Farmers and Gardeners Association is a broad-based community that educates about and advocates for organic agriculture, illuminating its interdependence with a healthy environment, local food production, and thriving communities. We love it with turkey and roast chicken. Guzzi originally put sweet potato roots into a container of potting mix in his greenhouse in early spring, broke off the slips as they developed and planted them in 4-inch pots, later transplanting these to the field – which, in the fall, resulted in a ball of sweet potatoes under the plant, then more roots developing out from the plant--all with a lot of scurf (a fungus that discolors the skin and is harmless but reduces marketability). Introduction Potato (Solanum tuberosum) is a cool season crop that produces best yields when temperatures average slightly below 70º F during the growing season. It has a very uniform shape and size, and it outperformed ‘Beauregard’ in Grube’s trials, but the slips are difficult to get because, even though the variety has replaced ‘Beauregard’ nationally, commercial slip producers have not yet started using this variety. He grows on a very sandy soil, using tine weeding a couple of weeks after transplanting. Harvest new potatoes at the end of the season with a spading fork. To grow sweet potatoes you will cultivate “slips”, which are stems that grow when the potato is submerged in water for an extended period of time. Potatoes grow in sizes from fingerling and round to those that are 1 pound each, and in colors that include brown, purple, gold, blue and red. I'm going to try growing sweet potatoes in New Hampshire. Store sweet potatoes at 55 to 60 F. and 75 to 80% relative humidity, much like winter squash. Kept moist and at 75 to 80 F, sweet potatoes sprout – the first step in producing “slips” for growing more sweet potatoes. It has light orange skin and deep orange flesh. Guzzi cures sweet potatoes in the greenhouse until early November, keeping the temperature at 55 degrees at night. Harvesting Sweet Potatoes Becky Grube photo. Potatoes grow best in cool, well-drained, loose soil that is about 45° to 55°F (7° to 13°C). Growing Sweet Potatoes Indoors. Guzzi, noting that sweet potatoes “mutate like mad,” has selected for a sixth type. Its flavor is average but disappointing given its color. Harvesting . Many of the sweet potatoes have been treated to reduce sprouts, and you won't know the specific type of sweet potato you have purchased. Soil Requirements. In June he brings the containers to the field and breaks off and plants the slips directly. Click on "Address Lists" at the top of the page and then "Sweetpotato certified seed producers list.” Sweet Potatoes require a long warm growing season. Place each section in a jar or glass of water with half of the potato below the water and half above. To create sprouts, carefully wash your potatoes and cut them either in half or in large sections. She also noted a study in Connecticut in which plants were grown in sandy, river bottom soil with and without black plastic; no difference in yield occurred. Sweet potatoes are warm-season plants that are very sensitive to cold temperatures. Sweet potatoes are native to the sub-tropics and grow best in temperatures above 70°F / 20°C and in humid conditions. The root will continue to produce sprouts. Conference participants had no shortage of questions and suggested research topics, including: Sweet potatoes require high temperatures of 21-26C (70-78F), and their long stems need plenty of space as they have a vigorous growth habit. Before planting, thoroughly dampen the bed. Roots on the top of the pile, he noted, get darker than those underneath. This variety had average flavor and fairly low Brix readings in Grube’s trials – but consumers recognize this as a typical sweet potato, most like those in supermarkets. The information in this article is from that session and from Grube’s publication, “Growing Sweetpotatoes in New Hampshire.” Sweet potatoes are known for their sprawling habit, but … They’re delicious, packed with nutrients, attract attention at farmers’ markets, and store up to a year or even longer. Cracking may increase with soil moisture level. Water regularly and keep the area around the growing plants free from weeds. In milder areas they are well worth trying outdoors, planted through a sheet of black polythene to … ‘Carolina Ruby’ yielded well, and its color is useful in a diverse collection. Cornell AgriTech . Most sweet potatoes in a traditional grocery store have been chemically treated to prevent sprouts, so opt for a sweet potato from the local farmer’s market instead. ‘Covington’ is a new release from North Carolina State University. Good yields are possible without plastic mulch, but the warming mulch extends the growing season by a few weeks, which can increase yields dramatically. Some N.H. farmers say voles have eaten their entire harvest. Growing Onions in Northern New England Publications \ ... Long-day onions – the kind growers in New England plant – need more than 15 hours of light daily during the peak of their growing cycle to form bulbs. Do plants need to be grown on black plastic? Steele Plant Co., LLC, 202 Collins St., Gleason, TN 38229; (731) 648-5476; www.sweetpotatoplant.com (Johnny’s Selected Seeds buys its slips from Steele.) Caring for Sweet Potatoes. Sweet potatoes are started from “slips” (rooted stems). 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