Verbena bonariensis
An ornamental plant, planted March to May, or sown September to May.
In September: nothing to do. It can be sown under cover now.
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Verbena bonariensis, month by month
Bar: the usual months. Sprout: this month.
| Sowing, planting or job | Sep | Oct | Nov | Dec | 2027Jan | Feb | Mar | Apr | May | Jun | Jul | Aug |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sow under cover. | usual | usual | usual | usual | usual | usual | usual | usual | none | none | none | none |
| Sow outdoors. | none | none | none | none | none | none | none | none | usual | none | none | none |
| Plant a pot-grown Verbena bonariensis. | none | none | none | none | none | none | usual | usual | usual | none | none | none |
| Protect the Verbena bonariensis over winter. | none | none | none | usual | usual | usual | none | none | none | none | none | none |
| Cut back the Verbena bonariensis. | none | none | none | none | none | none | usual | usual | usual | none | none | none |
What to do, and when
The usual months for a UK garden. Your own plan gives the week.
Sowing and planting
Sow under cover September to April, on the surface. Strong source: RHS.
Sow outdoors in May, 1.3cm deep, 15cm apart. Moderate sources: RHS and Suttons.
Plant out, 50cm apart. Strong source: RHS.
Plant a pot-grown Verbena bonariensis March to May, 50cm apart. Moderate source: RHS.
Protect the Verbena bonariensis over winter
Cover the roots with straw or mulch, and leave dead stalks until new ones appear in spring.
Usually December to February. Moderate source: Gardeners’ World.
Cut back the Verbena bonariensis
Cut the old flower stems down so several new stems sprout from the base, for a bushier plant.
Usually March to May. Strong source: RHS.
What the source words mean
Strong: the RHS page for this plant is among them.Moderate: another trusted UK source, or the RHS on its group.
What not to do
Don’t cut it back in autumn
Leave the seedheads for the birds to eat over winter, and cut back in spring.
Moderate source: RHS.
Add Verbena bonariensis to my plot
Every line above names the page it comes from. Where we found no good source for a job, we left it out. Where the name “Verbena bonariensis” comes from.