PERENNIAL - Pincushion Flower Pincushion flower, or scabiosa, serves up dainty blue flowers all summer and into fall, making it one of the longest-lasting bloomers in the perennial bed. It likes sun or partial shade, and is best at the front of the bed. The foot-tall variety 'Blue Butterfly' stands up to heat best.
Look for Soft, Romantic Plants: Most cottage gardens have a romantic feel. Part of that feel comes from the flowers. Look for blooms in soft pastel shades. Also look for plants packed with petals, such as peonies and old roses. As an added bonus, many of these varieties are also wonderfully fragrant.
Veronica is easy-to-grow and may be the longest-blooming perennials in your garden! More perennials: http://www.bhg.com/gardening/flowers/perennials/the-best-perennials-for-cutting/?socsrc=bhgpin091913veronica#page=20