lush flower bed with sage blue and purple flower combined with yellow ornamental grasses lush green color perennial prairie flower

bed blossom blue bunch cluster color combined echinacea field flower flowers fluffy garden gaura grass grasses gray green kniphofia kobold liatris lily lindheimerei lush lythrum meadow nature oenothera orange ornamental patio perennial pink plant prairie purple purpurea roof sage salicaria spicata spike spring summer swan top torch tritoma urban uvaria vertical white yellow