If you like subtlety, you're going to love 'Blue Angel', a large-flowered Clematis that produces an abundance of soothing, soft bluish lavender flowers from early summer to early fall. The flowers measure a substantial 4 to 5 inches across. They have a fine, silky texture and ruffled edges, giving them a lacy, delicate appearance. In truth, these plants are hardy, vigorous growers that are very versatile in the summertime landscape. Like other clematis varieties, Blue Angel is a vining perennial that looks amazing on a trellis or pergola, along a fence line or over a garden arbor.