Polemonium Touch Of Class here is three years old in southeastern pa. It’s in a well-drained area that gets full sun and dry winters. It is next to the building which give it a moderation in temperature.
usually Polemonium like part shade, dry feet but not super draught. zones 3-8. and they aren’t long-lived. we found agood microclimate for ours. And that is the joy of perennial gardening. These plants slow up in the heat but early spring they show off. Especially a year like this one where winter spring never ends.