We grow a considerable variety of vegetables from seed: beans, beets,
turnips, radishes, kale, sometimes corn, etc. We get good germination
rates on pretty much everything, except peas. (Snow & Sugar Snap, if it
matters.) For those, we get maybe one in ten, at best. The few that do
germinate seem to grow OK. Not that we have a lot to compare them to.

We're in central NY, zone 5-ish. We start planting (peas) around
mid-April, depending on the weather, and give up around the beginning of
June.

I kind of suspect the problem is soil temperature. But (a) you're
supposed to plant peas early (?), and (b) everything else explodes in
early June, so it seems like we've covered both ends of the temperature
range.

Any thoughts would be appreciated.

Thanks,
G