For a central Texas garden, you can grow lots of greens thru the winter especially if you
water b4 the cold and cover.
....just some notes here:
Cilantro, garlic and onions all were fine down to 20, even uncovered
Dill, carrots, peas, and broccoli needed the covers the most.
Spinach, kale, arugula, mustard, turnips, kohlrabi, and beats all seemed happier being covered on the coldest nights
row row row your boat, gently down the stream
merrily merrily merrily, merrily, life is but a dream.