Seeing this thread's title on the main forum page continuously for the past month or two reminded me that I should go look at the lavendar I have out in one of the garden beds. I had promised my daughter that I would bring down a plant for her group's garden and went online to check to see if dividing a plant would be in order. (It isn't.)
I had started about 8 plants from seed a few years back. (8 plants germinated from a pack of seed. No variety listed on the packet except "English Lavendar".)
I found an excellent series on growing and propagating lavendar on Youtube (in the Expert Village series.) What I found was:
1. I was lucky to be able to get them to start from seed.
2. Everything else I did was wrong.
I set the transplants out far too close (about 12" apart, planted them in a bed that didn't receive full sun and didn't prune them at all, much less annually as is required. The grower in the video said a common problem is the plant gets old, woody and leggy and the best remedy is to pull it out and replace it. Sigh.....
Anyway, what I did do was take a bunch of tip cuttings and now have a couple flats of cuttings in Pro-Mix. If a fraction of them root, I will be happy. I did not have rooting hormone available, wasn't sure about the chemicals in it and didn't have time to run around looking for it, so I dipped the stems in honey, which I've read is sometimes used as a natural replacement.
The old plants are now mature at 3 years old and I could have been looking at a huge crop of lavenar cuttings this past year, but what I had was a small, though nice-looking little patch of struggling plants. Though it wasn't encouraged, I pruned back most of the plants to just above the woody stems and I'm transplanting them to give them sun and space. We'll see how they fare.
Live and learn.