One of my favorites! I usually grow these every year, I just love the way a small plant covers perhaps a square yard by the end of the season and seed themselves around, they thrive in hot sun and dry conditions yet don't mind if it's wet as long as the soil is well drained, nothing seems to eat or bother them. A truly great addition to the border or in a tub, fantastic plant!
Seed I find hard to harvest though, any tips?