In my part of the country, annual poppies are autumn sowed. I can't grow the perennial types.
Out west (of here), people scatter the seed on top of the snow...
your poppies should be fine if they are out in the garden.
The only problem might be if they were planted too closely together.
I've had to go in and thin my plantings, which is very sad as the ones I pull don't survive the experience.... and when I don't thin, they thin themselves, and not in a nice way.