You have to stay after them they have a very short reproductive cycle , check any plants that were near it . What I did for my daughters mite plants was take them to the sink wash the leaves then spray , I had to use Safers it was to cold to take them into the yard and use Keltane . Take no prisoners ! Gin
Great advice from everyone. If you haven't done it already, check your other plants growing near the ill-fated dtps. and treat so you don't lose them too.