Butterfly Bush, Summer Lilac
B. davidii will adapt easily to almost any good garden soil, so long as they receive full sun.
In the northern portion of the range, Buddleia tend to die back to or near to the ground over the winter. Even in areas where they do not die back, they should be cut back to the ground in the fall or early spring to encourage vigorous spring growth. They break dormancy late in the spring, but with the onset of warm weather will grow rapidly and without attention. Do not overfeed.