Examine the spacing and development of the carrot seedlings. Be aware that the seedlings may not emerge uniformly.
Identify the areas of the crop where the seedlings are crowded together. Continue to monitor the carrot seedlings as they mature and become thicker.
Thin the carrot crop when the seedlings reach a height of one inch. To thin the seedlings, gently grasp their bases and extract them from the soil. Be careful not to damage the surrounding carrots. Thinning should be performed at intervals of one to two inches apart when the seedlings first emerge. The second thinning, several weeks later, should be at intervals of two to three inches.