Common vervain forms an airy, upright framework of branched green stems with opposite, deeply lobed leaves. From midsummer into early fall, slender wiry spikes carry many tiny pale purple flowers without making the planting look heavy.
Grow it in full sun in neutral to alkaline soil that drains freely. It suits cottage gardens, prairie-style planting, wildflower meadows, wildlife gardens, and relaxed mixed borders, where its narrow outline can thread between broader perennials and grasses.
Water new plants while they establish, then water border-grown plants mainly during prolonged dry spells. Avoid rich feeding in the ground and sow seed in spring for additional plants.
