Butterfly bush blooms from early July. The blue flowers especially attract butterflies (cabbage white, lemon butterfly, but also attract other insects.The butterfly bush is a deciduous shrub that is at home in any garden. The Empire Blue can grow up to 2.5 meters tall. The butterfly bush is a strong plant with few soil requirements. A warm location in full sun will promote flowering. A moist soil is not desirable for the butterfly bush. In maintenance, this is not a complicated plant, the flowers bloom on 1-year-old wood and annual pruning back after frost in April will encourage flowering.