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
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