The silver-blue petals and thistlelike foliage of sea holly (shown here with bright green dill) stand almost hip-high in the flowerbed. This ghostly giant is a biennial, and the plant readily reseeds itself. Grows comfortably in Zones 5-8.
Violet, lavender, deep purple, fuchsia -- there are so many shades of purple, especially when it comes to flowers. Get inspiration on how to infuse this diverse color into your own flower arrangements by taking a look at some of our favorites.