Direct sow from mid-April until early August in friable, fertile, deeply worked soil. Choose your least weedy soil for carrots, as they are tricky to cultivate when young; carrots can take 10 days to germinate, and can be quickly choked about by weeds. Thin young carrots seedlings to 2" apart, then thin baby carrots by pulling out every other carrot, allowing the remaining carrots to grow to full size.
While good carrots can be grown in any soil, they only grow to supermarket size in loose and deep soils without too many rocks. (Even if strangely shaped or undersized, their flavor and crunch is superior to store-bought.) Fall carrots can be stored in plastic bags in the refrigerator or in a root cellar for months. Do not store fresh carrots with the tops on, they draw water and nutrients from the roots. Rather, remove the tops after harvesting and use to flavor soup stock.