Method 1: The Plastic Grocery Bag (Best for a small harvest)
- Do not wash the sweet potatoes. Gently brush off the loose dirt with your hands or a dry cloth.
- Place a few sweet potatoes into a standard plastic grocery bag.
- Punch several small holes all around the bag so air can flow in and out.
- Tie the handles of the bag loosely.
- Place the bag in the warmest spot in your house. A sunny windowsill or on the floor near a heating vent works well. The sweet potatoes will naturally release their own moisture as they sit, creating a humid micro-climate inside the bag.
Method 2: The Plastic Storage Tote (Best for a medium harvest)
- Get a large plastic storage box or tote. Drill or cut several holes in the sides and lid for ventilation.
- Lay the unwashed sweet potatoes loosely inside the box. Do not pack them too tightly; they need space between them.
- Place a clean, damp towel or a wet sponge in the corner of the box. Make sure the damp cloth does not directly touch any of the potatoes. This will provide the necessary high humidity.
- Put the lid on the storage box.
- Place the box in a warm room, near a space heater, or on top of a warm appliance like a refrigerator. Check the towel every day to ensure it stays damp.
Method 3: The Small Room Setup (Best for a large harvest)
- Choose a small, enclosed space in your home, such as a spare bathroom, a walk-in closet, or a small pantry.
- Place your unwashed sweet potatoes into wooden crates or cardboard boxes that have plenty of holes punched in the sides.
- Put a small electric space heater in the room. Set the thermostat to keep the room’s temperature right around 80 to 85 degrees Fahrenheit.
- Place a small humidifier in the room. If you do not have a humidifier, set a few wide, shallow pans of water directly in front of the space heater. The heat will evaporate the water and fill the small room with humidity.
- Leave the door open just a crack, or run a small fan on the lowest setting pointing away from the potatoes to keep the air gently circulating.
What to Do After Curing is Complete
After 5 to 10 days, check your sweet potatoes. If the skin feels firm to the touch and any scratches look completely dried and sealed over, the curing process is finished.
- Prepare for Storage: Carefully move the sweet potatoes into clean cardboard boxes, milk crates, or paper bags.
- Find a Cool Spot: Move the boxes to a dark, dry place that stays around 55 to 60 degrees Fahrenheit. A basement, a cool closet, or a pantry floor is usually perfect.
- Never Refrigerate: Do not ever put sweet potatoes in the refrigerator. The cold temperature will permanently ruin their internal texture, making the centers hard and completely changing their natural flavor.
When stored properly after a good homemade curing process, your sweet potatoes will stay fresh, sweet, and ready to eat for up to six months.
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