In school days, we have studied some techniques to cut the stem of a plant and properly implant any other plant stem. The cut should be in V shape and reverse order in both the stems. The new stem should be tied with some mud and left for internal activities like tissue culture. Now i don't remember this details and i don't know that how far the above facts are true. I have a red rose plant. I want to make the red rose plant bloom yellow and white roses as well. Can any experience gardener, give me details how to do that. If possible plz give links of videos of such activities.