Q.Should I Cut Back My Max Perennial Sunflower After It Blooms
I live in SC and have a potted maxmillion perennial sunflower. I think it’s going to flower soon. Right now it’s about 6 to 7 feet tall. After it blooms should I cut it back and if so how far? I’ve never had one before.
Certified GKH Gardening Expert
I would wait until it flowers. Once the flowers have faded, you can prune off the spent blooms. Other than this, they can be cut back by half, at any time, to promote vigor. At the end of the year, you will cut them to the ground level, as they will come from rhizome the next season.
This article will offer more information on perennial sunflowers: