Bidens tend to show their beautiful colors earlier than other summer-blooming annuals, kicking into high gear as soon as the weather warms up. 'Bee Bold' bidens has striking yellow-edged orange blooms that are so profuse, they often cover up the spent flowers beneath. The green foliage is not as feathery as some of its cousins, and will form an upright, spreading mound, 14 to 20 inches tall and up to two feet wide. The more sun, the more flowers, so grow bidens in container planters or in borders where they can enjoy the afternoon sun.