D. Landreth, the oldest seed company in America - formerly of Philadelphia, later of Baltimore, and now located in New Freedom, PA - is having its Fifth Annual Heirlom Plant Sale on Saturday and Sunday, May 16 & 17. There will be a special lecture on Saturday night by Amy Goldman, author of Melons for the Passionate Gardener, The Compleat Squash, and Heirloom Tomatoes.

Unfortunately, it's the same day as the Native Plant Sale in Baltimore :(

Here's a link with directions.

Here is a link that might be useful: Landreth Plant Sale