Tall see-through stems carry clusters of mauve-purple flowers that butterflies adore, perfect for weaving through a border. Self-seeds freely and is a weed risk in some regions.
At a glance
- Plant type: Perennial
- Mature size: 1.5 m H × 50 cm W
- Aspect: full sun
- Water: happy on low water
- Frost: hardy
- Maintenance: low maintenance
- Origin: Exotic
About Purpletop Vervain
Botanically, Verbena bonariensis is a fast-growing perennial in the Verbenaceae family. It reaches around 1.5 m tall and 50 cm wide at maturity, with semi-deciduous foliage. Purple flowers appear for much of the year.
Where to grow Purpletop Vervain
Purpletop Vervain suits warm-temperate, subtropical and Mediterranean climates and grows best in full sun. It is frost hardy and shrugs off cold winters. It also is a genuinely water-wise choice.
Soil & planting
Most soils suit Purpletop Vervain provided drainage is reasonable. Plant into well-prepared ground, firm the soil around the roots and water deeply to settle it in.
Watering & feeding
Purpletop Vervain is happy on low water, so once its roots are down it needs little supplementary water. A feed in spring with a balanced fertiliser keeps growth strong. In its first year, water deeply once or twice a week to settle the roots in, then taper off as it establishes.
Pruning & care
Prune Purpletop Vervain after flowering to keep it compact and encourage the next flush of blooms. Overall it is low maintenance.
Using Purpletop Vervain in the garden
Purpletop Vervain earns its place for attracting butterflies, feeding bees and pollinators, cut flowers for the vase and a feature or specimen planting.
Companion planting & design
For a cohesive, low-care bed, pair Purpletop Vervain with other plants that enjoy the same happy on low water and warm-temperate climate. Repeat it through a border to tie the planting together and give a sense of rhythm.
Good to know
Be aware it can self-seed or spread into bushland in some regions — check it is not a declared weed in your area before planting.
Buying Purpletop Vervain
Plant Sale lists Purpletop Vervain as potted plants. Stock isn't live yet — register your interest using the panel above and we'll email you the moment we have it ready.