Weed by hand once or twice, then mulch to control weeds and protects carrot shoulders from the sun, which turns them green. Tender, juicy carrots are produced by rapid growth, so keep well watered if it doesn't rain. Tunnel in the roots are caused by carrot fly larva. Control them by covering the growing plants with floating row covers and annual crop rotation. Row covers also prevents aster yellows, which is spread by the six spotted leaf hopper.
Carrots are an excellent storage crop.
To store in the ground. If you have a cellar, store them in buckets of moistened peat moss.