In this genus, ornamentals and edibles abound, from edible sweet potatoes (see Sweet Potato) to trellis-climbing morning glories and the sweet potato vines that fill out container plants so well.
Most have hard seeds; to encourage faster sprouting, nick the coating or soak overnight in water before planting. For annual display, sow seeds in place after frost danger is past; or, for an earlier start, sow seeds indoors, then set out plants 6–8 in. apart. Use morning glory vines on fence or trellis or as groundcover. Or grow in containers; provide stakes or a wire cylinder for support, or let the plant cascade. For cut flowers, pick stems with buds in various stages of development and place in a deep vase; buds will open on consecutive days. The morning glories listed here do not include the weedy plant known as wild morning glory or bindweed (Convolvulus arvensis). These are similar only in appearance.Ipomoea tricolor
Vigorous-growing annual to 10–15 ft., with large, heart-shaped leaves. Showy, funnel-shaped to bell-like flowers are single or double, in solid colors of blue, lavender, pink, red, or white, often with throats in contrasting colors; some are bicolored or striped. Most types open only in the morning and fade in the afternoon. Bloom from summer until frost. Among the most popular selections is ‘Heavenly Blue’, to 15 ft., bearing 4–5-in., pure sky blue flowers with a yellow throat. Seeds are toxic, with ingestion causing nausea and chronic psychosis.
Though its common name implies Irish origin, this plant is in fact native to the Mideast. Grows to 2&n...
Low foliage mounds about a foot wide. Flower stems, 1–2 ft. topped with white blossoms in summer...
From southern Europe. Grows 2 1/2 to 3 ft. tall, 1 ft. wide. Oblong, coarsely toothed leaves. Many lon...