Whether annual (tender) or perennial, verbena plants do not have to be pruned but can benefit from periodic and seasonal trimming. Dead or damage plant parts should be removed at any time of year when they appear. ... If plants look a little weak or like they could use a boost apply aflower fertilizer.

How do you prune verbena?

Verbena can grow very quickly, so you may need to trim it back to control growth throughout the season. To do this, cut about 2 inches (5.1 cm) off the ends of the plants where you want to control growth. You can do this about 2-3 times over the season or as needed. This is called tipping the plant.

Should verbena be cut back in winter?

Garden care: In cold conditions Verbena bonariensis can suffer dieback if cut back in autumn, so it's best to leave the plant until spring and cut back the old growth when you see the new shoots emerging at the base. ...