Photo by CandideUK (All rights reserved)
These are biennials and perennials, with over 250 species, with leaves which are small, dark, irregularly shaped and toothed. They will bloom in late spring, summer and autumn.
How to propagate Vervain
You can propagate from seed in the autumn or spring, from stem cuttings in summer or autumn.
Other uses of Vervain
Beds and window boxes