How to thin out carrots

Carrots need space to develop fully so, once germinated, go over your rows of carrots and pick out the weakest-looking vegetable seedlings to leave a 2-4cm space around remaining seedlings. If you're very careful in extracting the seedling from the row, you could try transplanting it into a new row and watering it in well to help it establish itself again. Repeat the thinning in three to four weeks. Carrot root fly is always a threat to your carrots, and never more so at thinning out time, so be ready to cover them with horticultural fleece to prevent the fly from laying eggs on your crop.