Carrots is one of those vegetables that is mostconsumed, cooked as well as raw. That makes it a very good option for a kitchen garden. 
Carrot is a root vegetable with roots growing up to a feet.
Selecting a proper container is essential for a good yield. Most containers are too shallow to grow tap-rooted vegetables like carrots, and containers dry out too quickly.
Carrot can grow in a 12" -18” (30-45 cm) deep planter box or pot.
Deeper the pot, better the yield.