I know a good knowledgeable landscaper who would be able to help you. I believe he can do a design also. Homeworks, LLC.

http://www.houzz.com/pro/homeworksde/homeworks-llc

They are licensed and insured. I had them do some work at my house. The owner, Mike, knew all about native plants and why they are important. He educated me on the fact that they think many good insects are gone because we are putting in non-native plants which drive the good insects that are native to this area away.

Thanks very much!! I just sent them an email. I knew one of this community would come through.

Liz, Did you have any luck with your native plant garden design? If not, I might be able to help. I'm a landscape designer in coastal Del. and have a special fondness for native plants.