Lemon verbena is a large shrub in my part of the world - I call it a baby tree. And even here in the subtropics, it will die right down in winter. At that time, I cut mine right back almost to soil level as soon as it begins to lose its leaves, and it always comes back early in spring. Even with such heavy pruning, it's a sprawling, gangly, untidy-looking shrub, but I think it's pretty. I hope you have the real French Tarragon, and haven't been fobbed off with the Russian imposter, as happens so often. The French one is well-behaved - the Russian one is a thug, and virtually useless. You'll find out soon enough! The Russian one self-seeds, the French one doesn't. Your thyme could be the one to take over. It's usually well-behaved, but if any of the lower branches touches the soil, it could produce roots - hence a new plant. This is a good thing with thyme - you've always got babies coming along, even though the mother will die (or begin to look very tired) after 2-3 years. I suggest encouraging the plant(s) to propagate by layering - just pin the branch down gently in contact with the soil, using a bent piece of wire. You can encourage it to grow roots by giving it a gently little rub on the underside with some sandpaper.

There's a special Forum dedicated to those who are interested in sharing cuttings. I'll attach the link for you. Here is a link that might be useful: Exchange Forum

After some research follwoing my own posting a while ago, I found that lemon verbena has very low fertility, and therefore cuttings are the only viable option. Does your friend particularly want lemon verbena, or will anotehr lemon-scented alternative do?

Yes I do Pam. I've been on daves over 7 years & 2 on plantswap. Before houzz took over gardenweb I was on it about 5 years plus the 2 years since it morphed to houzz. Another one is garden.org that I've been on about 2 years as tabbycat. Between all 3 I've probably traded 200 times in those years with wonderful people who, like us, love growing things & sharing. The postage has gone up in the 7 years so that's the only negative to me. Boy, but I have gotten some beauties by starting with small starter plants, cutting & seeds which are economical in the big picture. I don't have a phone that makes it instant to send pictures so I still do it the old way of taking a picture with a camers, downloading it to computer then uploading when I want to share it. I'm way behind on that at this time so that's another 2017 'to do'. It's tedious so I don't do it much. I do love to look at others though when I have time just to see the beauty. I'm also on Pinterest as Trudy B. if you want to check out my pins. Do you save things there? Have a great day, Trudy