Common name, Slender Vervain, is a low-growing perennial species that produces an abundance of punchy purple flowers from summer and into autumn. Its lax growing habit makes it ideal for planting in great swathes and softening the edges of borders.Sunlight: This plant receives full sun in its natural habitat. It can handle part shade, but greater sun exposure leads to a better growth rate. The tuberous vervain is drought-tolerant, but it does best when situated in moist soil.Plant Type: Perennial, DeciduousGarden care: In cold conditions Verbena bonariensis can suffer dieback if cut back in autumn, so it’s best to leave the plant until spring and cut back the old growth when you see the new shoots emerging at the base.Sold in a 1 litre pot.