I placed four Buddleia Buzz, a dwarf variety, outside the kitchen patio doors. This was to attract butterflies and was very successful as you can see in this video:
This variety has quite short broad bright green leaves. It flowers a great deal with a good scent. It seems to have lost some of Buddleia’s traditional drought resistance. Two of the plants are in containers and need quite a bit of water. The ones in the ground are easier to maintain. When I walk out of the kitchen a cloud of butterflies rises. The video is from August 2015 with music played by me.