Linda ~ Chervil is a cool weather annual for you also? That is pretty much what I have read for the south. After last night, we'll see how cold hardy it is too. How did you use the Chervil?
I also have Comfrey growing and last summer grew a blue Borage for the first time. It has a beautiful bloom and then... I found volunteer plants throughout the raised bed. That was o.k. as it didn't seem to thrive in the heat.