Hey Julie. So, if you want earlier moonflowers, you have to start them inside in extra large peat pots, and set the whole thing out in mid-may (mine would have been growning since, well, about now....) I put mine into a larger pot with dirt when the get 12" long, then they transplant with less shock. Ditto morning glory. the chickens probobly love the big seeds, just don't give them too many of the heavenly blue seeds!!!!
Id think true wild rose would be an ok choice, but you know how much chickens love to scrach and play in the soft dirt at the base of big plants. You may just have to put up an itty bitty bit of fence to shelter their roots, so the chickens don't tear them out.
Ok, I'm really off to bed this time.