I'm surprised that you didn't get any problems with carrot flies. I tried growing my first batch of carrots in the garden, and they did not do well, as most of them got infested with carrot flies, with their larvae burrowed quite deep in. I've learn my lesson and I am practicing companion planting this year with garlic and chives to ward off those pesky flies. I haven't harvested my carrots yet, so I don't know how successful that method is yet. It is good to see you have success with your carrots.