you could do what hacksore said, and take the chance...but that could ruin your others plants...i say take it out back like old yeller and do what needs to be done.
those are def. not lavender, they would have an exotic looing strain, and developes the darkest purple coloration you can imagine the coloration is intence and leaves will turn to nearly black. but id wait to clone until they have developed properly, and also ive heard from sources that blowing...