Liriope muscari - We need 19 Easy to grow, and spreads. Good for lining sidewalks. I have these and the flowers are a pretty shade of purple. Bees and butterflies like them. In winter, they produce interesting large seeds.
Sedum ‘Autumn Joy’ -- This plant is as dependable and adaptable as they come. Its flowers bloom from August into November; they open pink and mature to a copper befitting of autumn. It is 2 feet tall and wide, with succulent stems and leaves.
1 Salvia nemorosa from the mildly aromatic silvery green leaves to the violet flower spikes with purple stems. Bees love the flowers that stay looking sharp long after the petals fall, thanks to papery bracts that hold their colour.