Beets, Chinese cabbage, collards, Irish potatoes, Bibb lettuce, mustard, radishes, spinach, Swiss chard and leaf lettuce can take a light frost but will be damaged once temperatures drop to the mid- to upper 20s, Ward Upham of K-State says. You can extend their season by covering them.
Hardier vegetables are cabbage, broccoli, cauliflower, Brussels sprouts, carrots, turnips and kale. They aren’t damaged until temperatures reach the low 20s, Upham says.
“Certain root crops can essentially be stored outside even after the leaves have been damaged or killed by frost,” Upham writes in the Horticulture 2013 newsletter. “Beets, carrots, potatoes and turnips can be mulched and harvested as needed until the soil starts to freeze in late November to December.
“Growing vegetables in Kansas can be a challenge, but we have an extremely long gardening season. We can harvest from early April (asparagus) to early December. Winter is a good time to plan and prepare for next year’s crops.”
Apply 1 to 1 ½ pounds actual nitrogen per 1,000 square feet of lawn, Upham says, using a soluble (quickly available) nitrogen carrier such as urea or ammonium sulfate. “Avoid products that contain water-insoluble nitrogen (slow-release) for this application,” Upham says. “As always, sweep up any fertilizer that gets on driveways, sidewalks, or streets and reapply it to the lawn.”