I'm overwintering some lavender plants in the sunroom, with supplemental LED light.
This was a broken-off piece from a much older, dried out and almost dead looking plant. I trimmed back the top and roots, and potted it in potting soil. Given how it's recovered, I think it could become a nice bushy plant and bloom next year. The shape looks like Lavandula angustifolia (English lavender) but I can't say for certain.
This one is the hybrid, Goodwin's Creek Grey. I bought it at Winco. It's a good variety, and kind of unusual. I don't know if a lavender plant, planted so late, will survive bitter cold ahead. So I'm wintering it in the sunroom. So far, about three weeks, it's thriving.
This one is "French Lavender", Lavandula dentata. I read that this species wont survive outdoors in bitter cold.
I'm doing an experiment - one is planted outdoors in the border, one is in the sunroom.
These are cuttings I took last summer from a Spanish lavender (Lavandula stoechas) plant. They are growing well, and have roots emerging from the drainage holes, but need shelter for the winter. I'll plant them outside next Spring.
Here is part of my sunroom setup. They are on a plant stand with LEDs. They are doing pretty well, along with some rooted rosemary and sage cuttings.