Old or vintage gardening books (pre-1975)
Antique or heirloom bulbs (esp. iris, daffodils, and glads)
Antique/Heirloom/Old Roses
Native perennials (esp. beautyberry, identified sunflowers, bee balm, identified echinacea, ironweed, and mountain mint)
Native ferns
Pink rain lilies
Sweetspire (Itea virginica)