Forgot to thin seedlings - plants collapsing

[ListenLinda]

Hi all, very new/novice gardener here.

I had great ideas about the flowers I wanted to grow this year so happily put seeds in ground and pot. Too many now it seems and I didnt thin them out (due to not knowing I had to)

So, my pots have loads of green but no flowers.
The Nasturtiums are taking over every thing, can see the buds but no flowers yet.
My poppies are just starting to open up but there are so many they are collapsing and not standing up straight.
Just watered them and half of them appear to be laying flat!
Is there any saving them? Or should I write it off for this year with no proper flowers and learn my lesson?

The nasturtiums will bloom if they have buds (aphids notwithstanding). They thrive in poor soil so if you used new compost they might flower less than they would have done but they should be fine. Just don't feed them.

Shirley poppies are quite fragile. If they are in a pot, move them out of the wind and rain, either to a better spot or just move them if the weather is bad. Try to water them at the bottom (I use a plastic bottle with holes in the top). You could build or buy a cage to support them, google peony cage. I have some that self seeded in a tiny pot that I ignored that keep getting knocked down in the rain but they revive.