Sure. You can just stick a leaf in water, too.

Plumbago is one of the easiest plants to root from cuttings. Either stick some in the ground & keep moist until rooted, or dig up suckers that already have roots. They are very vigorus(sp?) growers. Shirley

Depends. For cuttings, the lights are around 12-16 inches above, depending on how tall the cutting is. For my mature hoyas on u-hoops, some are just an inch below the light cage.

It was a long time ago... but it was probably in late spring or summer when the plant was in active growth. The problem with rooting a cutting now would be getting it in the ground in time for it to get established before freeze-up. I’m not sure when that would be in Chicago.... But if whoever gave the OP the cutting might be able to give another one in spring if this one failed, I’d be inclined to give it a try and plant the rooted cutting either in a sheltered area close to the house to give it as much time as possible in unfrozen ground - or plant it in a large pot and store it in the garage for the winter. DH grows rosemary in a pot that he stores in the garage for the winter - rosemary would never survive outdoors in winter here but always survives in the garage. While I haven’t tried it, I’d bet lavender would do the same. Our garage is uninsulated and unheated. The pots are stored in the middle section of the garage. There are windows high up on the outer wall so there is light but it’s not particularly well-lit. What survives in there can be variable. The hardy begonia gdinie gave me last year didn’t survive and neither did a butterfly bush seedling. But rosemary did, as did garlic, and carrot and green onion seedlings. Leeks can be harvested during the winter from the pots in the garage. The OP probably has nothing to lose by trying... The alternative would be to try to grow it in a pot indoors. If the OP has a grow-light set-up it might work, but might not too....! Flip a coin! (Is it possible to take a cutting from the cutting and try it two different ways...?)