Plant — Fescue grass, lettuce, spinach, garlic.
Sweet potatoes grown for eating can be damaged by the cold, so they should be harvested before the first fall freeze, Ward Upham of K-State says. But they can be harvested earlier if you want smaller sweet potatoes. Dig up a hill as a test to see if they are the size you want, Upham says.
Once you dig them, you should cure them to help any small wounds heal and convert starches to sugars for a better texture and flavor, he says. Do this by placing the potatoes in a warm, humid location for five to 10 days. A temperature of 85 to 90 is ideal, he says; heating up a small room with a space heater is one option.
Store sweet potatoes at a temperature above 55 to preserve flavor and shelf life, Upham says.