This great, annual symposium is organized by the Loudoun County Master Gardeners Association
Full schedule for this event, and all of the info you need, is here.
I will be bringing seeds and books to sell - sadly, it is too early for seedlings!
The book signing is at noon, and my talk, A Selection of Epic Tomatoes, will start at 1:30, and run until 2:45. The other presenters for the day-long event are Rick Darke and Tim McCoy - all info is at the link above.