From what I found. They graft them on two different stocks. Euphorbia Lactea (which can grow to 10 feet) and Euphorbia nerifolia (the India Good Luck Tree). The latter one seems to give me problems. It seems in time to rot off the graft and has to be planted on it's own. The ones grafted on it own kind (E. lactea) takes the graft the best. Also they revert back to it's original type (E. lactea). I have the 'Ghost' or white with the pink tips kind. In the above picture of the yellow type is what I have been looking for in many years. When I first purchased mine, it just had a fan, but then kept growing all out from many places.
Euphorbia Lactea
Euphorbia nerifolia
Euphorbia Lactea Crest
Crest reverted back to E. Lactea 'Ghost'
Stush
