Is it too late to start these off from seed now for this Summer flowering? They look really good from the cell packs I've seen especially the Sherry Trifle mix.
Rossendale - Lancashire
It is probably to late now for the vast majority of bedding plants from seed, they are not the slowest from seed to flowering stage probably around 8 weeks but that leads us going into August , you've already missed 2 month out of the 4-5 month growing season . Buy some plants and collect the seeds , they may not come true to seed. They really do need deadheading a lot to keep them going .