You're info is correct Greyduster; they seed everywhere. Unknowingly the little darlin's Verbena (seeds) slipped through my fingers when dead heading. Two months later we had 30-80 plants 3-8" high. Butterflies love them.
Two years ago I had 12 Verbena boniensis left over, so dug them into a Daphne bed only 8" apart. We were rewarded by their graceful, arching branches and the cream and mauve gladiolas I naughtily squeezed between the verbenas. The verbena has made the Daphne has put a spurt on.
I started gardening properly when retired. So my DBH designed and built a potting shed-cum-green house. Two sides are shed the other two sides are covered with polytunnel plastic. He also designed and made benches that can collapse and hung up. This will be the shed's first winter. The plastic part also has a "storm cover" when we're deluged with rain and westerlies.
Good luck Greyduster.
Thought this might amuse some of you!
Updating bathroom with a walk-in shower unit.


. It annoys me no end when I see them growing wild on every piece of waste ground!

