Keep your soil covered with plants or compost. Grow cover crops (lava beans, alfalfa) – they heal and enrich the soil.
If you use only kitchen scraps in your compost pile, you create a bacterial compost which weeds and Bermuda grass love. Add straw and paper to make fungus predominant compost. This is good for most plants.
Plant cool season vegetables such as:
Brussel sprouts mustard
fava beans spinach
kale Swiss chard
For a more detailed winter planting guide go to Master Gardener planting guide.