George Washington's Mount Vernon, south of Alexandria, Virginia, has a plant sale each spring. Among the offerings are some of the same types of plants that George and Martha had in their own gardens. I was tempted by several tomato varieties, geraniums, purple cornflower, heliotrope, various herbs, and more.
After taking my time reading about all the plants, I scored something called False Blue Indigo, a perennial that one of the Mount Vernon staff said wouldn't disappoint. Even the leaves are interesting. It should do well in a sunny spot but tolerates some shade. That's key in my setting in Northern Virginia, surrounded by mature trees.
I also bought yet another lavender, this one of the Provence variety. I'm not sure my woods-surrounded garden will get enough direct sun for the lavender, but I'm going to give it a try.
They had a nice assortment of seeds, too, which were collected from Mount Vernon's actual gardens. Pretty cool.
Learn more here: http://www.mountvernon.org/gifts/mount-vernon-historic-plant-and-garden-sale