Verbena Bonariensis

Hi. I’ve several verbena bonariensis that have self seeded/grown this summer. Still in flower, when would be the right time to lift n shift; in next few weeks before turning colder or wait till next spring?
And also, should the plants be cut back or just left and cut back next year or should they be left to regrow?
Thank you for any help 😃.
And also, should the plants be cut back or just left and cut back next year or should they be left to regrow?
Thank you for any help 😃.
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Posts
https://forum.gardenersworld.com/discussion/1059395/verbena-bonariensis-are-leaning-flopping/p1
Your conditions, climate and the plant sizes are all factors. I don't cut them back as it offers a bit of extra protection for them They don't always survive winter here.
Just ask for any extra info if needed - always plenty of folk to offer some help
I live in west central Scotland - not where that photo is...