I've read that potted geraniums can live several years, even decades. My geranium is a monster at two-and-a-half years of age. Is there any special care that it requires as it ages? And can I grow a new one from a cutting? It has a much thicker stem than the type of of plants I normally grow from cuttings. Do I dry out the cutting and use a root hormone or should I just stick it in water until it roots like I would do with my pothos or my wandering jew?