Good explanation Two Sheds. However, I do think we have to be sure whether we are talking about geraniums or pelargoniums. Pelargoniums are the big flashy flowering jobs that are sold for bedding and pots (commonly known as geraniums). They respond really well to drying out for a day or two before potting up. True geraniums have softer growth, subtler colours and can be increased by cuttings or division of established plants.