The problem is that there is still moisture in these plants. Until that moisture is gone, the organic material has the potential to discolor and rot. Encasing it in wax doesn't stop this process. While this method can, in theory, preserve a rose for a couple of months, some colors fade much quicker than others (light colors, for example, will turn brown faster) If you want to preserve a rose indefinitely, you have to feed it glycerin for several days before the waxing process.
