I have tried purple carrots before and got a few good ones, most did not do well for me but boy, they sure were pretty, especially when you sliced them. Love how the centers go from orange to purple.

Your sweet potato plants look pretty healthy. Trying them for the first time in our very wet climate to see how they will do, they only really started growing a couple of weeks ago so I am not sure if we will get much. At least a couple of the plants look healthy now and I just added a couple leaves to our salad for tonight. :)