Photo: Cody Hough, CC BY-SA 3.0 · source
Pruning guide · Perennial
Blue vervain (Verbena hastata): when and how to prune
Verbena hastata
Blue vervain (Verbena hastata) is best pruned in March.
| Pruning months | March |
|---|---|
| Flowering | July–September |
| Good for bees, butterflies and birds | Yes, for bees and butterflies |
| Native to Belgium | No, planted |
Blue vervain (Verbena hastata): when to prune it?
In March, before the new shoots start to grow.
What else to prune in those months? March
Blue vervain (Verbena hastata): how to prune it?
- Cut last year’s dried stems down to just above the ground.
- Leave the seed heads standing over winter: they decorate the garden and feed birds.
- For more compact plants, shorten the shoots by a third in May; flowering then comes slightly later.
How much to cut, and how often?
- One pruning period a year: March.
What does it mean for wildlife?
- Blue vervain (Verbena hastata) flowers in July–September, when it attracts bees and butterflies.
- If you only cut back in March, the old stems stand through the winter: insects overwinter in them and birds eat the seeds.
Caution: It seeds itself readily: cut off the spikes before the seed ripens if you do not want seedlings.
Nearby: related pruning guides
Plant profile: Blue vervain (Verbena hastata) · Pruning calendar and basic rules
This guide is compiled from the Bladwijzer plant profile and pruning calendar.