Verbena Bonariensis is fantastically easy to grow, is a prolific self seeder and adds wonderful colour to your garden from early summer right up to when we experience the first frosts in the autumn. As if that's not enough, it's foilage is evergreen and butterflies and other flying insects love this plant! You only need a few plants to start off and a year or two later you'll be giving the seedlings away to your friends.
I planted them in a border amongst giant delphiniums and the combination earlier this year looked stunning - having said that they look equally great on their own and due to their sturdy stems are reasonably self-supporting. They can grow to a good height - mine have reached about 1.5m this year, but with the quantity of rain we've experienced many plants are taller than usual... so don't be put off. Another good thing about them is that despite their height they do not disguise other plants which surround them due to their open stem structure. In my opinion every garden should have some!