Choice plants for connoisseurs of blue flowers. Bear one-sided clusters of lobelia-like blooms in brilliant blue, violet, or white; blue and violet flowers are striking because of contrasting white eye or throat. Bloom profusely in warm shade or filtered sunlight. Graceful in hanging baskets or pots. Fine cut flowers. Sow seeds in early spring for summer bloom, in fall for winter color in warmest- winter areas or indoors. You can lift plants in fall, cut back, and pot; new growth will produce flowers through winter in warm spots.
B. americana (B. elata). Annual. From Tropical South America. Branching plant, 12 ft. high and wide, with roundish leaves. Violet or blue flowers 12 in. long, 12 in. across, are borne among leaves.
B. hybrids. These grow about 1 ft. tall and wide. 'Endless Flirtation' is white; 'Endless Celebration' white with purple flush; 'Endless Illumination' purple; and 'Endless Sensation; lavender-blue.
B. speciosa. Tender perennial usually grown as annual. Sprawling, to 12 ft. high, nearly a foot wide. Flowers dark purple above, pale lilac beneath, 1122 in. across. 'Blue Bells Improved', with lavender-blue blooms, grows 10 in. tall, needs no pinching to make it branch. 'Marine Bells' has deep indigo blossoms, 'Silver Bells' white flowers.