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

bed bloom blue bunch cluster color combined field flower flowers fluffy garden gaura grasses gray green joy kniphofia kobold liatris lily lindheimerei lush nature nemorosa oenothera orange ornamental patio perennial pink plant prairie purple red roof sage salvia sanquisorba sedum spicata spike spring summer telephium top torch tritoma urban uvaria veronica vertical white yellow