As for deadheading a Butterfly Bush, just where should one make the
cut? Immediately beneath the flower cluster, or just above a
branching node?

Fleemo
Either way seems to work. If you have just one large terminal flower
cluster, just cut close to it. If you have a large terminal and two smaller
side clustesr, cut back to above the next node. The flowers will not be
as large as the first bloom. My butterfly bushes are on their third
round of flowers. Love'em!!

These cool nights and mornings are terrific, aren't they?

Emilie
NorCal