Asters Great for cutting and for bedding, there are several types of annual asters with various daisy-like flower forms and colors. A good source of strong blues and pinks. They need full sun and well-drained soil. The annual version of this popular perennial is a pretty filler that covers itself with tiny flowers in any sunny garden. One of the best white varieties is 'Covent Garden'.
Pale pink is an option, too.
Bachelor Buttons Also called cornflowers, these tall, willowy plants have showy blue, pink and white flowers. Bachelor buttons attract both hummingbirds and butterflies. Grow in full sun and well-drained soil. A member of the impatiens family, balsam are tall and hold their flowers close to the stems, unfortunately sometimes hidden by the leaves. Like impatiens, balsam are shade tolerant.