Possums? Bunnies? caterpillars? Slugs/snails? Rats do not typically eat leaves of any sort - they prefer fruits, seeds & meat.

Thanks, Carol,

I have a raised box that is 2+ feet above the ground. I see no cats or snails. They are snipped off at the center and nowhere to be found.

I had this problem with seedlings last month (tray on a patio table) and it turned out to be a cuban tree frog. Just looking for variation in his diet, I guess.

Wow, who knew! They are all over here. I'll watch for a green paste to show up on the windows...