I have a pink fairy gypsophila that I would like to propagate. I lost one over the winter and cannot find a replacement, so I want to propagate it. I've read that double gypsophila is grafted on to some other rootstock. That makes me tend to think that rooting cuttings of them is not easy. Since I can't find a plant for sale, and I need another one to replace the one that didin't make it over the winter, any tips on propagating these from cuttings?