Flowers for an end of June wedding

MHave you sown enything?
Cornflowers
Orlaya
Ammi
Snapdragons
Larkspur
Cosmos.
Scabious
Knautia
Clary sage - you can get it in purple white and pink.

Veronica
Roses
Peonies? They are over before end of June here.

I just had a look at some of my photos from last year. If you have a greenhouse and keep dahlia tuber undercover you could get a fair amount flowering by end June. You would need to get them sprouting indoors.

Have planted out a few “standard” blue cornflowers from an Autumn sowing.
Have just bought a pack of mixed cornflowers from Lidl and they popped up in three days.
i’ve never had much success with snapdragons, so giving them a miss.
Got sowings of cosmos, orlaya and the three colours of clary going.
Wondering if I ought to order some cosmos plug plants as well.
Hadn't thought of scabious and larkspur - good idea - thank you. Do you reckon I’d have any if I sowed them today?
Not going to bother with dahlias, but thanks for the suggestion. Too many earwigs for my liking.