Roses Only delivers six days every week, so the one you love could be having fun with a stunning bouquet very quickly in any respect. Floral freeze drying is a technique by which flowers are preserved in 3D by a process through which they're frozen at a temperature of -50 OC after which subjected to sublimation where the frozen water trapped in between the petals go away in vapour kind with out melting or inflicting damage to the flowers.