it grows about 15 inches tall and 2 feet wide and has green foliage and periwinkle flowers. it\u0027s showtime\u2014and this late-summer bloomer is as showy a flower as they come! cardinal flower, a native perennial, produces bright red flowers on tall, . tall perennials such as delphiniums and eremurus (foxtail lilies) do well at the back of the border, but some other tall plants can be placed in the middle . in late summer, showy, nodding, pale-yellow flowers rise above the large palmate light-green leaves of this herbaceous perennial. tall, stately bear\u0027s breeches make a statement in your garden. small perennial backyard gardens | perennial-garden-design, 1543×1294 in 886kb. tall flowering perennial plants photos. tall flowering perennial plants gallery. tall flowering perennial plants, aggregata plants \u0026 gardens: group planting of tall herbaceous. persicifolia \u0027grandiflora alba\u0027 \u2013 also known as peach leaf bell flower, it is a june-july bloomer with very tall white flowers on a short compact plant.