|'Nantes Express' is a good, medium-sized carrot. It is ready for harvest by early to mid-summer Loose, well-drained soil, free from clods and stones is a must for carrots. If your soil is less than ideal, plant only short rooted varieties. A hardy biennial grown as an annual, carrot tops are a rosette of fern-like foliage growing from a swollen tap root. A cool weather crop that is easily grown with few disease or pest problem, they should be planted in early spring with successive crops being planted every 2 to 3 weeks until early summer for a continuous crop.