Historic garden plant sales and an exchange in Southern MD

I live in St. Mary's County Maryland and wanted to let anyone willing to come, about the plant sales out of the historic gardens for Sotterly Plantation and Summerseat farm. They are both the day before mother's day and only about 20 minutes from eachother. Sotterly also has a plant exchange the same day. Here are the websites.
http://www.sotterley.com/news_events.htm and summerseats http://www.summerseat.org/

Sotterly is also having a garden fair the weekend of April 25-26. Sat. and Sun.

If you like native plants and can get to the Eastern Shore of Maryland, Adkins aboreteum has a plant sale the day before mother's day too.
http://www.adkinsarboretum.org/

It is a great place to visit. They have beautiful trails and it is near Tuckahoe State Park and campground if you wanted to make a day or weekend out of it.

I wish I could go to the plant exchange listed but I am graduating from college that day. I would much rather go to the plant exchange lol.

Thanks for this info.!