Herbs in Montana

I live in Northwestern Montana and would like some reccommendation for herbs and other plants that will grow here. I prefer perennial.

Northwestern Montana, USA has climatic zones fron 4 to 6 with 5 predominating. Any plants whose latin names are followed by the symbol "P", for perennial, in our catalogue are hardy in zone 5 and should be hardy in your area as well. Anything followed by the symbol "TP" for tender perennial, will not be hardy.