We could just let the yard grow up and get this look.
Names of flowers. lilac alliums, catmint, perennial sage (Nepeta, salvia, & alliums)
senecio mandraliscae - drought tolerant with texture and a blue tint. (blue chalk sticks; blue fingers; & blue fries)
blue oat grass in pots at the front step.
Ephedra equisetina (Bluestem joint fir) 4 - 6 feet tall and 3 - 4 feet wide. female plants have red, berry-like fruit in midsummer.
Fall asters (symphotrichum oblongifolium) pairs well with ornamental grasses
Globe thistle (Echinops ritro)
BAPTISIA AUSTRALIS (false indigo) color Twilite Prairieblues.
Dictamnus albus (gas plant) because it gives off an oil that makes a tiny spark if ignited. does not like to be moved.
Acanthus (bear's breeches) spreads by runners. grows 3 to 4 feet wide and up to 5 feet in bloom. beefy foliage.
Walker's Low catmint (Nepeta x faassenii) grows 3 feet wide and high.
bluebeard or blue spirea (caryopteris x clandonensis)