Betty Corning is a lovely lavender blue hybrid selection of Clematis viticella and crispa. She produces a display of nodding 3" flowers from mid-summer until early autumn. She isn't a wimp and can reach 12' or more, but her habit is more open, and she is best used where her grace can act as an accent to twine across and through early blooming shrubs for late season color. 'Betty' blooms on new growth, so take care of cutting back long tangled stems in late winter, early spring. Fall applications of limestone to keep the soil sweet are a good idea.