Every time I trim my wild wisteria, I get some late bloomers. I don't trim it to get late blooms. But if I don't trim it, it will take over the whole deck and all the railing.
@dutchothotmailcom Thank you, Esther! You just commented on my reason for trimming. My deck was replaced and the new one is only a few years old, so I have to keep the vines from taking it over. =)