Another favourite. Easily grown from seed and flowers all summer.
[attachment=1]
Lovely flower, I don't know why more people don't grow them! Here's mine which you helped identify some time back. :)
http://www.allotments4all.co.uk/smf/index.php/topic,54368.0.html
I love them, butterflies and bees love them. They are about the only thoroughly dependable flower in our hot and dry summers.