I think Borage will grow anywhere. We grew it when I was a kid way up in Northern Ontario. Usually had frost in June and again in August. If her "Rosemary" winters it's not Rosemary

I've seen borage grown as a commercial farm crop around Edmonton. I tried growing stevia in my backyard one year -- got enough leaves to sample and decide it wasn't something that really suited my taste, but that was about the extent of its growth.

My lovage plant is many years old and comes back beautifully. Also have lots of lavender Munstead. I had a rue for many years but it didn't survive transplanting - they apparently don't like being moved. Haven't found another in the garden centres here yet.

I grew borage in zone 6 altho it's annual so should grow almost anywhere. Pretty plant I should try again.

Difficult to believe rosemary would survive a cold winter altho I grew it in the garden from seed before I heard that's difficult to do! I can't get one to overwinter in the house so have given up and treat it as an annual.

This year I had lovage, oregano, thyme, purple sage, lavender, and chives overwinter and bought dill, parsley, rosemary, peppermint (growing in a pot, never again in the garden), more oregano, thyme, and green sage - which apparently the marmots like so not sure if those will survive. :-(

The most worthwhile "unusual" herb I've grown was cilantro. It's so delicious for cooking and making salsa, and it looks nice and self-seeds too. I haven't grown it for a few years but I should again.

Sweet woodruff is a nice shade perennial, good enough for its ornamental value even if you don't use it for anything else. It will spread to fill a space.

Both borage and woodruff come very close to crossing into the weed category for me, the dill crossed over long ago its everywhere. I remember one very wet summer where I cut the borage back every week because it would shoot up so fast and then the rain would beat it down. the bees love it tho

I wish my dill would reseed every year. The past couple of years our falls have been so crappy the seeds have not matured. Can you believe it I traded for dill seeds on the "exchange" site.

Still need to get my butt in gear, and seed some more herbs. My seedlings of lime basil, sweet basil and rosemary got attacked with aphids and did not survive.

Also do cilentro, thyme. Cheryl

I did Stevia from seed this year and they are planted out in a raised vege bed. I find the taste is somewhat like sweet tea. My plan is to dry and store the leaves.I grew borage one year but I kept finding seedlings for several years afterwards and yes the bees love it. Jean

That is hard to believe, Cheryl! We're usually overrun with dill!

Thanks for the suggestions about borage; I'm definitely going to try that one next year.

None of my dill reseeded itself either, although I do have plenty of coriander coming up again. That's amazing to me, as I was sure that I cut off all the seedpods while they were still green and brought them inside to dry out. Hm.

I have comfrey in the second year. It's about 3' around and has nice pink flowers. I have it partial shade. Apparently, the leaves are an excellent source of potassium.

Caraway is a biennial and survives the winter here.
Borage and Dill reseed here.
Lovage returns as a perennial here.
Caroline Calgary