My boyfriend and I have 7 ducks 4-6 weeks old I think (I stopped counting) the pen they live in during the day has some trees and grass but a lot of dirt. What is some plants I can grow in there that's safe & healthy for my Khaki Cambells. I'm going to buy seeds online so anything can be recommended as long as the ducks will enjoy it. Because the area is kinda in the woods next to our house it doesn't get a lot of sun due to the surrounding trees. I live in Maryland so we have hot summers and cold winters, we are willing to replant next year if necessary.