Rosemary, being a perennial, can it be planted in the colder regions?
Can Rosemary Be Planted Year Round in Zone 5?
Certified GKH Gardening Expert
Rosemary is really a zone 6 plant. You can get it to winter over in zone 5 if it is in a sheltered location, like near the foundation of a house. Even then it will be iffy. It is best to either bring it in for the winter or buy new ones each year.