Posted: 10/10/2014 at 08:55
Mine have never self seeded, they rarely last though the cold wet Dordogne winters for a second year either. Forgot to sow seeds, just bought some plants. But Lyn on the Forkers chat thread has just said that she takes cuttings every year. Didn't know you could do that.
One year I made a nursery bed in the veggie garden and scattered the seeds on the ground. They were doing well then something ate them, so now I sow in trays in the GH or cold frame and then pot them on to plant out in the autumn.