The slender vervain is a smaller than its cousin 'bonariensis'. Free-flowering, it produces masses of purple flowers in summer and autumn.

Good for pollinators.

RHS Award of Garden Merit.

Height and Spread: 0.6 x 0.4cm.

Aspect: Full sun

Soil: well-drained

Flowering season: Summer

Uses: Courtyard, Wildlife garden, Containers, Borders and beds