Indian Summer black-eyed Susan (Rudbeckia 'Indian Summer') is a flower garden workhorse. From midsummer to frost, this rugged, easy-to-grow plant produces masses of long-lasting golden yellow, daisy-like flowers with contrasting brown centers. The flowers are excellent for cutting.
Golden chain tree (Laburnum) is an upright, vase-shaped tree that tops out at 15 to 20 feet. It produces striking chains of golden-yellow flowers each spring.
Bearing yellow or orange daisy-like flowers through the summer and into fall, Kelway golden marguerite (Anthemis tinctoria 'Kelwayi') is a cheerful perennial for the cut flower or border garden. The abundant blooms are held aloft on sturdy, long stems that reach up to 3 feet tall.
Also called butter-and-eggs, yellow toadflax (Linaria vulgaris) produces snapdragon-like flower spikes in early spring. Its vigorous growth has landed it on the "noxious weed list" in some states; where it is allowed, it should be planted in an enclosed area where its extensive root system can be controlled.
The tulip tree (Liriodendron) is a large, fast-growing tree best suited to large spaces. Its yellow show comes twice: yellow blooms in late spring and golden leaf color in the fall.
A long-flowering vine, canary creeper (Tropaeolum peregrinum) is a perennial in the far South, and grown as an annual farther north. It will clamber over supporting structures, and blooms from summer to fall.
If you like yellow flowers, why not make a border of them? There are many easy-to-grow perennials that will bring sunshine to your garden, including daylilies (Hemerocallis) and ox-eye daisy (Heliopsis helianthoides), shown here at the peak of their summer display.