Pycnanthemum virginianum 24-36" tall. Makes a tasty minty tea traditionally used to settle indigestion. Spreads readily. Densely flowered, attractive to pollinators. Native. Z4.
Viola sororia 6-10" tall. North American native with cheery blue-purple flowers and attractive heart-shaped leaves, all edible. Larval host plant for multiple species of butterflies. Z3.
Salvia azurea 3-5' tall. North American native with delicate spires of sky-blue tubular double-lipped flowers and sweetly scented foliage. Incredible in mixed bouquets. Blooms from August to October. Z4.
Thymus vulgaris 10-15" tall. Fragrant sprawling perennial brings depth of flavor to soups, gravies, casseroles. Said to calm the nerves, soothe headaches. Bees love it! Z4.
Verbena hastata 5-7' tall. Elegant tall branching spikes of vibrant blue-purple flowers. Attractive to pollinators. Used as a nervous-system tonic and mild sedative. Full sun. Native to North America. Z3.
Verbena stricta 12-48" tall. North American native. Attractive to pollinators, most notably the Buckeye butterfly. Birds will devour the seeds! Blooms June through August. Z3.