Am I too late to plant maincrop pots?
I wouldn't have thought so. Would probably do better if you had chitted them. I would put them in rather that waste them
you can still set them well into June ;)
I've planted in May and had a reasonable crop. That's in a decent year, mind. I did the same thing last year, half of them rotted in the ground from the wet, and the rest got blight in June. Let's hope we don't get a repetition!
they are well chitted (ie forgotten about) so will whip them in this weekend!