Picture posting is enabled for all :)
Tell me the varieties and I can probably tell you. Usually it says on the packet on in the seed catalogue but UK stockists don't seem to do this as much.I would be quoting US dates bit it wouldn't matter as it is relative anyway. By the way, Swift is also a supersweet so you can both plant as they don't need to be isolated from each other,you are safe!! XX Jeannine
I did find a multi coloured very edible corn in a catalogue somewhere this year which temped me , I will have to find it as it was new to me.
Or you could plant one now and the other in a few weeks' time (check how long they take first, the idea is to have them flowering at different times), plant them at opposite ends of the plot, and you should be OK.