As is standard with all root crops, they should be sown where they are to grow. For best results make shallow drills in rows 10” apart. If you mix the seed with some radish seed before sowing, the radish seed will grow quickly and when you harvest the radish it will leave enough room for the carrots to grow and effectively save you from having to thin them out. Cover the sown seed lightly with soil and then cover with a burlap/hessian cloth. Water using a sprayer hose through the cloth. The cloth helps to hold moisture in the soil in those first crucial days where germination is beginning.
As soon as the tiny seedlings begin to show, remove the cloth to prevent them growing into it. Planting carrots with this method ensures an even and successful germination.