Posted: 26/04/2016 at 15:18
It's very cold, cornflower germinate well at this time of year usually. If you're going to re-sow, wait for this extra winter to end,
poppies can be a bit erratic. Mine sow themselves and do it in late summer.
Native wildflowers can all be sown in autumn, outside. It's what they've been doing since before we invented gardens and greenhouses.
I don't think wildflowers can be considered as a group needing poor soil. They all have different needs. There's a wildflower for every soil type. The poor soil thing is probably about growing wildflowers in grass, like a hay meadow. In rich soil the grass will swamp everything but a few toughies.