I've never grown this before, I bought a small plant in early summer and it has spread itself and bloomed its socks off. Now I am wondering, will it self seed (we have one of the mildest UK climates), or do I need to collect seed and start it off under glass?
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These are the transplanted ones growing in dirt (I wouldn't grace it by calling it soil!) down my lane.
Thanks everyone for your advice. I think I'll take the belt and braces approach, and sow some in pots in case they don't take in the border.
Same thing with verbena boniarensis, carefully nurtured seedlings all died so gave up and got a single plant, I now have seedlings growing in the cracks between slabs in patio!
I am gently pulling them up and potting on. Got half a dozen healthy plants.