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Verbena bonariensis


Argentinian Vervain

An ever popular part of any herbaceous border

A wonderful long flowering plant that adds structure to a garden through summer into autumn. The tall stately stems are clustered with a haze of small purple flowers which are very attractive to butterflies and bees and provide a lovely drift of colour.


Best in a sunny or lightly shaded position, use in a border, gravel garden or container.


Easy to grow, but needs a well-drained soil. Add coarse grit or sand to the planting hole if your soil is heavy and wet in winter. Use a good quality general purpose compost for container growing and raise the pot on 'pot feet' through the winter months to help with drainage. Once flowering is finished leave the stems to give structure through the winter and cut back in spring.

This vervain is native to tropical South America from Colombia and Brazil to Chile and Argentina.

Plant details

In depth plant information

Property Value
Plant type Perennial herbaceous
Flower colour
Foliage colour
Typically available May - September
Season of interest Summer, Autumn
Flowering June - November
Evergreen No
Plant height 150 cm - 250 cm
Plant width 10 cm - 50 cm
Fragrant flowers Yes
Attracts bees Yes
Attracts butterflies Yes
Plant height in 5 years 200 cm
Hardiness zone (?) H4

Will perform best in these conditions

Property Value
Soil type Clay, Loam
Light exposure Full sun
Soil drainage Well drained
Planting instructions

Water the plant in its pot thoroughly before planting – give it a good soaking. Prepare the area by digging a hole twice the size of the pot. Dig compost into the base of the hole. Remove the pot and position the plant in the hole, with the top of the rootball about level with the surrounding soil. Refill the planting hole with a mixture of garden soil and compost, firming as you go. Water in well and keep well watered during the plant's first year.

Planting site Gravel garden, Flower border and beds

Typically available

From May to September