You may want to select the short butterfly bush variety which reaches 3-4' upon maturity. It blooms from June through September. Just as the bigger version does this one works well as a cut flower. It attracts hordes of butterflies so you can enjoy the show outside!
Pictures from Walters Gardens, Inc.
Location:
Sun
Size:
36"-48" inches tall
Flower Color:
Blue, Purple, white
Bloom Time:
June, July, August, September
Soil Conditions:
Dry, Medium
Trim/Prune:
Trim in Spring after new leaves appear. Trim to 2 inches below leaves. If no leafing out - trim to the ground.