Sweet potatoes have a longer local season than most vegetables because they cure and store so well. A well-run local farm can supply sweet potatoes from October through early spring, making them one of the most reliably local vegetables in the off-season. And the variety range — from the familiar Beauregard to Japanese white-fleshed and purple types — is worth exploring beyond the standard orange sweet potato.
Varieties worth knowing
Beauregard — The most widely grown variety in the US. Orange skin, vivid orange flesh, moist and sweet when cooked. The standard commercial variety, bred for high yield and uniformity. Excellent for baking, mashing, and roasting.
Jewel — Similar to Beauregard but slightly less sweet and with a firmer texture. Good all-purpose variety. Common at farm stands.
Garnet (Red Garnet) — Reddish-purple skin, deep orange flesh. Very sweet and moist. Often the most flavorful of the common commercial types.
Covington — A newer variety developed in North Carolina, now the dominant commercial variety in the East. Similar to Jewel and Garnet, with good sweetness and moisture. Common at mid-Atlantic and southeastern farm stands.
Japanese sweet potato (Murasaki) — Purple skin, white or cream-colored flesh. Drier and starchier than orange varieties. Very sweet flavor with a floral note. Excellent baked or roasted, where the drier flesh becomes caramelized and almost chestnut-like. Increasingly available at farm stands and Asian grocery stores.
Hannah (O'Henry) — White or tan skin, white flesh. Drier texture, mild sweetness, similar in some ways to a regular potato. Good for savory preparations where you want less sweetness.
Purple sweet potato (Stokes Purple, Okinawan) — Deep purple skin and striking purple flesh. Earthy, mildly sweet, and nutty flavor. Drier than orange varieties. The color (from anthocyanins) holds reasonably well in roasting, fades significantly in boiling. A striking addition to salads and grain bowls.
Diane — Orange-fleshed variety with excellent sweetness and smooth texture. A good Beauregard alternative when available.
When sweet potatoes are in season
Harvest season (August – October): Sweet potatoes are dug from late summer through fall. Newly harvested sweet potatoes are available at farm stands starting in September after curing.
Storage season (October – March): The main supply window for local sweet potatoes. Properly cured and stored sweet potatoes hold their quality for 4 to 6 months.
Off-season (April – August): Supermarket sweet potatoes from large commercial storage operations, primarily North Carolina and California. Quality is generally consistent but variety selection narrows to just Beauregard and similar types.
Sweet potatoes are one of the best winter storage vegetables available from local farms — worth buying in fall when selection is widest and prices are often lower.
How to pick sweet potatoes at the market
Look for: Firm sweet potatoes with smooth, unblemished skin. Even shape — excessively knobby or deeply grooved sweet potatoes waste more in peeling. No soft spots. Clean, dry skin.
Avoid: Soft spots or any give when pressed (internal decay), deep cuts or wounds in the skin (entry points for rot), shriveling (moisture loss), or any mold at the stem end.
At a farm stand: Ask about variety. A farmer selling multiple varieties will know which is best for baking versus savory applications versus the most intensely sweet. Also ask about "cull" or imperfect sweet potatoes — cosmetically flawed but perfectly good for anything cooked, often sold cheaper.
How to store sweet potatoes
Store at room temperature or slightly cool — 55–60°F (13–16°C) is ideal. A pantry shelf, cool cabinet, or dry basement works well.
Do not refrigerate: Cold converts sweet potato starches in a way that affects texture adversely and can make them hard or pithy when cooked.
Keep dry and ventilated: Do not store in sealed plastic. Paper bags or mesh bags allow the airflow that prevents moisture buildup.
Properly stored sweet potatoes last 3 to 5 weeks at room temperature, longer in a cool cellar or pantry. Once cut, wrap tightly and use within a few days.
How to cook sweet potatoes
Baked: 400°F (200°C), pierced several times, placed on a foil-lined sheet pan (they leak sugar). 45 to 60 minutes until a knife passes through with no resistance and the flesh is very soft. Eating the caramelized sticky skin is optional and excellent.
Roasted: Cubed, tossed with oil and salt, roasted at 425°F (220°C) for 25 to 35 minutes until caramelized. The natural sugar browns beautifully at high heat. A splash of maple syrup in the last 5 minutes adds a glaze. See our roasted sweet potatoes recipe for a reliable method.
Mashed: Baked or boiled and mashed with butter, a little cream, and salt. Japanese sweet potatoes make an especially elegant mash that needs less butter because their flesh is already so richly flavored.
In soups: Cubed sweet potato in lentil soup, in coconut-milk curries, or in a simple pureed sweet potato soup with ginger and lime.
Pan-fried or hash: Cubed parboiled sweet potatoes in a hot skillet with oil until crispy on the outside — a breakfast hash base that works beautifully with eggs.
Fries: Oven-baked sweet potato fries are popular but require high heat and not too much moisture — pat dry, use very little oil, and roast at 425°F in a single uncrowded layer.
Flavor pairings
- Butter and salt — The non-negotiable foundation. All else builds from here.
- Cinnamon and nutmeg — The classic fall spice pairing; brings out sweetness.
- Maple syrup — Natural sweetness amplifier; excellent in roasting and glazes.
- Ginger — Fresh grated ginger or ground; cuts through the sweetness and adds warmth.
- Lime and chili — The savory approach; lime juice and chili flakes balance the natural sweetness.
- Tahini — Roasted sweet potato with tahini and pomegranate molasses is a Middle Eastern combination that is extraordinary.
- Coconut milk — In soups, curries, and stews; tropical pairing that works across cuisines.
- Black beans — Burrito bowls, grain bowls, and stuffed sweet potatoes with black beans and salsa.
- Pecans and brown sugar — The casserole approach; classic for a reason.
- Miso — Japanese-inspired glaze: white miso, mirin, and a touch of sesame over baked Japanese sweet potato.