It’s harvest season: Did you know sweet potatoes are different from yams?


The harvesting of sweet potatoes is a common sight in Eastern North Carolina now during the fall season. Sweet potatoes are a bragging point in our region with North Carolina being number one for sweet potato production in the United States. North Carolina produces 50% of the sweet potatoes in the United States.

There are some 350 commercial sweet potato farmers in North Carolina. In 2013, 53,000 acres of sweet potatoes were grown in North Carolina for a total of 212 billion individual sweet potatoes with a farm gate value of $228.9 million.

North Carolina even designated the sweet potato as the official state vegetable in 1995.

Did you know that the sweet potato is no potato? The plant is a member of the morning glory family, and it produces bulging food-storage roots that are edible. In contrast, the white (Irish) potato plant is a nightshade family member that produces swollen underground stems called tubers. Sweet potatoes are grown in warmer climates, while white potatoes dominate in cool climate areas.

Sweet potatoes come in many different colors like orange, white, yellow, red and purple. The taste, texture, flavor, and nutritional content differs among the varieties. Orange sweet potatoes are the sweetest of them all.

Central Americans were raising sweet potatoes when Christopher Columbus first landed on their shores in 1942. He liked the vegetable so much that on his fourth voyage, he took some home to grow in Europe.

In the United States, orange-fleshed sweet potatoes have been mistakenly called yams for so long that both names are becoming accepted usage. The United States Department of Agriculture still requires, however, that food labels with the term “yam” be accompanied by the words “sweet potato.” True yams are starchy, underground tubers that historical artifacts indicate were a food crop in Africa at least 50,000 years ago. Unlike sweet potatoes, yams have a rough, scaly skin, and they are not sweet. Grown in tropical zones, yams also can reach up to 6 feet long and weigh more than 150 pounds.

Considered a superfood, sweet potatoes serve as an excellent source of vitamins A and C, contain more fiber than a bowl of oatmeal and more beta carotene than 23 cups of broccoli, and are free of cholesterol, fat and gluten. One medium sweet potato has just 103 calories, and despite its name sweet potatoes are diabetic friendly, causing no blood sugar spike. Sweet potatoes should never be refrigerated unless they are cooked. Temperatures below 55 degrees damages the quality and destroys the flavor, causing them to become bitter.

To celebrate sweet potato season, the Farm Credit Farmers Market will be holding a Sweet Potato Day on Friday, Oct. 18. We will be having a sweet potato recipe contest for those who have a delicious recipe featuring sweet potatoes that is blue ribbon worthy! The contest is open to all ages. Entries will be received from 1 to 1:30 p.m. The recipe must include at least 1 cup of sweet potatoes. Contestants must be present during the contest and may enter more than one recipe.

The recipe must be homemade, prepared at home, and presented ready to serve to 3 to 4 judges. Recipes must be presented with the entry as the first place winning recipe will be published in local media outlets.

Along with a sweet potato recipe contest, there will also be a food demonstration by Michelle Estrada, Wayne County Extension Family & Consumer Science agent to give ideas for a new recipe featuring sweet potatoes to try along with getting to sample the featured recipe.

Be sure to include sweet potatoes with your fall festivities and celebrate sweet potato season by attending Sweet Potato Day at the Farm Credit Farmers Market on Oct. 18.

Jessica Strickland is an agriculture extension agent, specializing in horticulture for North Carolina Cooperative Extension in Wayne County.

Upcoming Wayne County Extension Gardening Programs

  • Building Healthy Soils: Soil Testing and Fertilizers Workshop - Wednesday, Nov. 13, 10 a.m. to 1 p.m. at the Wayne County Extension Office, The Maxwell Center, 3114B Wayne Memorial Drive, Goldsboro. Building Healthy Soils workshop will cover how to improve and enhance your soils so your garden and lawn grows. Learn how soil testing can improve your soils and better understand how to select fertilizers. Registration fee is $5. Pre-registration is not required. Arrive a few minutes early to register.
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