I have two butterfly bushes in my yard in NE Ohio. Each one is planted in two opposite corners in my backyard, planted in sandy soil. Both are watered regularly with the sprinkler system and both are along the west side of the yard. The butterfly bush planted closer to the north is THRIVING. The one in the south corner had a few flowers and the leaves are falling off the stems. I cut back both bushes in February or March of this year.