'Black Knight' Butterfly Bush - 3 Gallon Potted ShrubThe Buddleia davidii Black Knight Butterfly Bush is a sight for the eyes planted in any butterfly garden landscape! As long as you have a sunny planting spot this flowering perennial shrub will flourish with big purple flower heads whose fragrance will attract butterflies and other pollinators like bees or hummingbirds to your landscape. This flowering butterfly bush plant features very dark purple conical flower heads that have a bloom time from