Butterfly bushes are truly butterfly magnets. However, if you want them to continue blooming from now until migrating monarchs pass through out state months down to road; you must deadhead the plant’s spent blossoms.
For reasons I do not understand, this spring my butterfly bushes have been covered with the largest clusters of flowers they have ever produced. Unfortunately, few butterflies were around to enjoy them. However, lots of bumblebees, honeybees, and carpenter bees constantly visited the nectar-rich blossoms while they were blooming.
Fortunately, butterfly bushes can be encouraged to produce a bounty of flowers throughout much of the growing season. All it takes is deadheading the bush’s flower clusters before they go to seed.
Butterfly bush w/spent blossoms
Recently I deadheaded my butterfly bushes for the first time this year. From experience, I know I will have to repeat this procedure many times. However, I realize that, if I am diligent, countless butterflies and other pollinators will benefit from the food produced by crop after crop of fresh flowers. In the past, I have been successful in prolonging the butterfly bushes’ blooming until the monarchs en route to their wintering home in Mexico. When they use my yard as a stopover area on their epic journey it is not uncommon to see anywhere from four to eight monarchs on a single butterfly bush.
When deadheading a cluster of flowers, remove the spent cluster down to the spot close to the point when the main flower stem joins two side branches. If this is done at the right time, the two side branches will quickly produce flowers too. When the blooms on the main branch and side branches have already turned brown simply, cut the stem just above the next juncture of side branches and the main stem.
This is definitely a case where a little time spent cutting back spent flowers will produce a beautiful bush and remain a source of nectar throughout the summer.