Roasted red, white, and purple potatoes: Combine equal amounts of red potatoes, white or gold potatoes, and purple potatoes to make about 2 1/2 to 3 pounds.Scrub the red potatoes but leave the skins on for color, if possible. Allowing the plant to die back ensures the skins of the tubers harden enough so they don't scratch off easily. The purple potato made its way to Hawaii and then to the U.S. mainland. Choose and Prepare a Container: Let me be very clear on this, almost any container will do with … In the case of potatoes, it is the anthocyanins that provide the deep purple color. A good rule of thumb is to watch for the first signs of yellowing leaves. Physical signs on the plant provide a better guide for when to harvest than the numbers printed on the seed potato label. New potatoes don't store well and are best used soon after harvesting. Growing potatoes at home really is lots of fun, Weaver says. If the plants don't die back before a hard frost, which sometimes occurs with late-season purple potatoes, you can dig up the potatoes before the plant dies off completely. I don't know how you are growing them but when I've done potatoes in the past I have tried mounding up soil and also spent hay and straw (hay/straw was easier for harvesting because there's no digging at harvest time and it's easier to just break open a bale and cover them. Tubers of standard white and red varieties generally are round to oblong and relatively thin skinned compared to russets. It is noted that the first purple sweet potato was bred by the Japanese and grown specifically on Okinawa, hence its name. Russet tubers tend to be … Purple potatoes require the same growing conditions as other potato types. Place them in a single layer in a warm, well-ventilated shady place for a week or two. Excavate lightly next to the plants and gently dig out a few tubers from each plant. This allows you to get an early start on the growing season. University of California Cooperative Extension Stanislaus County: Potatoes in Your Garden, University of California Cooperative Extension Contra Costa Master Gardeners: Contra Costa County Vegetable Planting Guide for Interior Regions. Purple potatoes are fun. You can dig up new potatoes at any time after your plant flowers. Jenny Harrington has been a freelance writer since 2006. The young potato tubers begin to form at flowering. As a general rule of thumb, more deeply colored vegetables and fruit have high antioxidant levels. These baby potatoes range from one- to two-inches in diameter. Selecting the proper variety, or cultivar, is important since varieties differ in yield, cooking characteristics, time of maturity, skin and flesh color, and storage life. They are also rich in vitamin C. Like all potatoes, purple potatoes may be large bakers, small round tubers or fingerlings. You can harvest “new” potatoes once the canopy flowers have bloomed, which is usually about six to eight weeks after the potato plants begin to grow. With frequent and consistent watering, even novice gardeners can grow bountiful harvests of purple potatoes. Growing an Okinawan sweet potato vine is rewarding as long as you have the right climate. 1. Sweet potatoes are sometimes confused with yams. While all the purple potatoes made acceptable home fries, the purple gnocchi were dense and gummy across the board, due to their low starch levels. Updated March 30, 2020. Blue/Purple Potato Varieties. There is no doubt that purple sweet potatoes have gained popularity—just open the pages of Eating Well, Martha Stewart Living, The Washington Post and O, The Oprah Magazine.Even journalist Dan Buettner, author of Blue Zones, credits these purple beauties with being part of the diet and lifestyle that has propelled the longevity of the centenarian Okinawa population. Different varieties of purple potatoes will have different storage times. Mature potatoes are usually ready three or four weeks after the tops die down. Click here to find out where you can purchase purple or blue potatoes. Once potatoes reach 6-8 inches in height, start to hill them up. I hear more and more people asking for purple potatoes. Most of the crop will be in the top 6 inches of the soil. After harvesting store them in a dark, dry place for a week at 65-70 degrees F. Then store them at 35-40 degrees F out of the light. Some potatoes are bred for early harvests and others are better as mature potatoes. Mashed Purple Potatoes: This recipe makes a beautiful dish with the deep purple color. It can be grown like other sweet potatoes and needs a long, hot growing season. Most gardeners pre-sprout, or chit, their potatoes. Weather, water and environmental stress can all affect the expected harvest time. The color does not affect flavor. Purple-fleshed sweet potatoes need a long, warm season to produce a good crop, but the starchy, deep-purple roots of varieties such as ‘Violetta’ and ‘All Purple’ are worth the wait. Note: The leaves of potato plants are poisonous to humans and animals. Increased interest in new gourmet varieties has added purple, blue, orange, yellow, and other colors to the inventory. Cover them with several inches of soil – this is known as “hilling” – at least twice while growing to protect tubers from light. Line the holes with coffee filters – don’t worry, they’ll biodegrade – and put about 3 inches of dirt in the bottom. Although potatoes have a reputation of causing weight gain, studies show that the type of potato you choose and how the potato is prepared could make a difference.. Plant three to six inches deep; fingerlings are planted more shallowly due to their smaller size. Cure for a day in a shaded area until the soil dries top 6 inches of soil summer. 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