To grow healthy carrots, you'll want to start with well-draining, loose soil that's free of rocks and debris, as carrots can be quite finicky about their growing conditions. A mix of compost and sand can work well. Sow your seeds about a quarter inch deep and keep the soil consistently moist, but not waterlogged. Full sun is best, so choose a spot that gets at least six hours of direct sunlight a day. Keep the area weed-free to prevent competition for nutrients, and avoid using high-nitrogen fertilizers, which can cause your carrots to fork or become misshapen.