Direct sow carrot seeds outdoors from March to July. Early varieties may also be sown from February to March in greenhouse borders or under cloches. Specific autumn sowing carrot varieties can be sown as late as October under cloches for an early crop in spring. Grow Carrots in a weed free, sunny position in fertile, light, well drained soil. Carrots dislike freshly manured soils so seed beds are best prepared in autumn, well in advance of spring sowings. Sow carrot seeds thinly at a depth of 1cm in drills 30cm apart. Germination will take 10 to 20 days. When large enough to handle, thin out the seedlings within each row to 10cm apart. Where space is limited, growing carrots in containers will also produce a worthwhile crop.