I'm missing this, unfortunately, but Wild Plant Nursery run by Earth Sangha is having a native plant sale of 'local ecotype' (planted directly from local, wild native-plant populations) on September 30, from 10 am to 2 pm, at the nursery in Franconia Park, Springfield, Virginia.

An all volunteer organization founded on Buddhist principles, the Earth Sangha restores native plant populations in Virginia parks.

More information, including driving directions, at their website.

http://www.earthsangha.org/wpn/wpn.html

Here is a link that might be useful: Earth Sangha