There's a Central American highland green pepper relative with some
frost and a lot of coolness tolerance, and a perennial I beleive,
which might well yield tasty peppers for years. J.L.Hudson listed
seeds years past. I've never grown it, but thought of it for
greenhouses. It a little hotter in flavor than sweet green peppers,
especially the seed-holding membranes, which trim off, as I remember
it.

Brian Cady