How to grow
Verbena can be planted now in a sheltered sunny spot. The soil must be slightly moist, light and well-drained, otherwise the plant may not live for long – enhance drainage and water retention by digging in lots of organic matter and grit prior to planting. Most verbenas can be grown in containers, if provided with excellent drainage and kept slightly moist.
Don’t cut spent verbenas down until spring, to allow them to set seed around the garden, and to protect the plant from winter weather. In late autumn, put the plants to bed by laying some dry mulch around the crown.
You can also sow verbena varieties from fresh seed in spring.