Cleomes may not be the most popular annuals sold at home improvement stores and nurseries, and it may be because they look rather weedy as young seedlings in six-packs. Unlike pert marigolds or dazzling New Guinea impatiens, cleomes usually do not start blooming until they are well established in the garden. Once the flower clusters emerge, you will see why gardeners add this to their list of easy-care favorites. Many petals radiate from a central point, forming a cluster, which tends to be softball-sized. Long stamens give the flowers a spiky look. Even the foliage is attractive, as it is fern-like and delicate.