I have 6 rose bushes, and most of them are starting to bud with multiple buds to a stem ( I don't know the correct term for that). I did cut several roses lately. I usually try to cut them 1/4 inch above the last leaflet with 5 leaves, but don't always do so. What have I done to make them all start doing this? A couple of the bushes have done this before, but not all of them. (I can usually make a cutting that has one rose only, not one stem with 4-6 buds with very short stems coming off the main stem).