I bought this Verbena Bonariensis last year and it was great and flowered right into November/Dec. I went for a wander today and I see it is started to shoot. Should I have pruned it to the ground? or do you leave them to get on with themselves?
Sorry for the terribly blurry photo, I took it with me phone.
As it's still relatively mild then it probably will still keep growing. So leave it for now. Once the weather does properly warm up then there may be some dead/dying bits which you can snip off. You may also spot self-sown 'babies' nearby later in Spring. Those can be carefully lifted & potted up/planted e/w.
If it produces new side shoots you can take those off as cuttings, which I try & do every yr. The normal time for taking cuttings is late summer/autumn for me, but they need overwintering in a coldframe/inside which you may not have.
Mine are still standing proud out there- shall investigate them around March, J.