You can usually harvest Okinawan sweet potatoes after 120 to 180 days. Growing purple sweet potatoes. You will need a warm sunny position, against a north facing wall is excellent. To harvest, use a pitchfork or digging fork to lift the tubers out of the soil. For these reasons, the … The only exception to this rule is if you’re in an area that is prone to frost. If the growing season has been good with adequate water and sunshine, harvesting sweet potatoes should begin about 100-110 days after planting depending on the variety. Sweet potatoes grow by forming tubers along their roots. Sweet potatoes that have brown, red-orange, or white skin with orange or white flesh are native to Colombia and southern Central America. Sweet potato slips are produced by year-old sweet potatoes in hot beds at large specialty farms in mid to late spring. In 2003, he was awarded these purple sweet potatoes as a prize at the state fair. Learn when and how to harvest and cure sweet potatoes to enjoy during the winter months. When deciding when to harvest sweet potatoes, choose a cloudy day if possible. But resist the urge to wash them: although the sweet potatoes need to be in a humid environment to cure, the tubers themselves shouldn't be wet. If you must harvest sweet potatoes on a sunny day, move the roots to a shaded spot as quickly as possible or cover them with a tarp. Because the sweet potatoes can form a good distance from the plant, work from the outer edges of the berm in toward the center. Sweet potatoes with purple flesh are from the same family as regular sweet potatoes. Generally speaking, you’ll get between five and ten sweet potatoes per plant. Keeping in mind that the longer you keep them in the ground the more vitamins they’ll absorb and the bigger they’ll grow. It is well known that sweet potatoes are rich in vitamins, minerals, and fiber and have good nutritional value. The best companion plants for sweet potatoes are other root vegetables like parsnips and beets. Purple sweet potatoes are fun to grow and cook with. The thin skins of the newly dug potatoes are susceptible to sunscald. Sweet potatoes are great for new green thumbs as they are easy to grow and aren’t fussy. There are several different varieties to try. Minor scrapes will heal during the drying process, but the best practice when harvesting sweet potatoes is to set deeply cut roots aside to be eaten first. Soil Requirements. It will take sweet potatoes between 90 and 170 days to grow depending on the variety. If you live in a cooler climate, harvest time will be shortly before the first fall frost (as early as 90 days, and as many as 120 days). Okinawan Sweet Potato was brought to Hawaii via Japanese and Okinawan immigrants during the sugar plantation era of the 1800s. After growing and harvesting your sweet potatoes, use your hands or a towel to gently brush off any large clumps of dirt, mud, or clay. Be on the lookout for sweet potato weevils, they will lay eggs in the stems and tubers if they’re left for too long. Growing sweet potatoes in water is easier than you think. Destroy the infected plants and spray the rest with a natural bug repellant. First, you need to avoid cold temperatures. The potatoes that are firm and moist are ready. In warmer climates, it’s easier to tell when purple sweet potatoes are ready to harvest because their vines will yellow and die back. There are 2 main culprits to avoid once your sweet potatoes are cured. We need to use early-maturing cultivation methods since 9 months would be too long here due to the changing seasons. Usually this occurs in late September or early October before the first frost. Sweet potatoes have delicate skin that is easily bruised or broken. If you can’t harvest sweet potatoes right away, cut those dead vines off at the ground so the decay doesn’t pass to the tubers below. Australia is home to a plethora of types of sweet potato, here are seven of the most common varieties. Lottie Dalziel, is a 4AM riser and coffee-addict who loves reading up on the latest trends in sustainability or discovering ways to upcycle almost anything! Overwatering can cause root rot and encourage unwanted pest guests. Grab a seedling from your local hardware or Bunnings and plant in wholes 15cm deep and around 30cm apart. This will buy you a few more days for harvesting sweet potatoes. Thyme is also a good herb to plant nearby as its strong smell keeps pests away. A purple sweet potato plant Sweet Potato 'Purple Raven' UT Ipomea batatas Not to Norfolk Island, NT, SA, TAS or WA 'Purple Raven' is a hardy, attractive, colourful plant with vibrant, deep purple, lobed leaves, it is very useful as a groundcover. 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