Instead of hunting for my Dave coleus every year I just take cuttings and grow indoors under lights for winter. Any gnats are taken care of with hydrogen peroxide and water solution. Leaves change colors indoors so it's always fun when they are planted out insun and get their true color back. I just planted out some cuttings from the cuttings in my shady garden. Not sure if the names but I think one is kong rose, they are really loving the HOT temps we've been having.