You'd have to look each up individually to know frost tolerance. And baby plants will be much more susceptible. Personally, I think I'd wait unless you can do some sort of cold frame. Also make sure the plants get well hardened off before planting out--nights still get chilly, and your seedlings have never had real light. You can start letting them have some out-time daily.

I would wait until after frosts have past before moving outdoors permanently. Once established, hardy herbs will do just fine but baby/indoor grown plants are different. And I agree with balloonflower - when you start getting mild days, begin hardening off your plants by moving them out during the day and back in for night. It is the best of all worlds that way.

FataMorgana