If you are thinking about designing your room with silk flower then may be the need of professional is not that important, but if you are planning for big occasions like wedding then hiring professional designer becomes key. Professional designers can help you in a great deal to give best results for your decorations and some benefits of hiring them are as follows.
You could create an arrangement for any size vase, the larger the vase, the more flowers and greens to use. For Christmas time, use red, white and maybe even green flowers (like green button mums). Also choose from a variety of greens and evergreens out there. Accent a red rose in a bud vase with some baby's breath and cedar. Deep red alstroemeria are especially beautiful. There are many other flowers that would be perfect to use for Christmas arrangements, the link below will take you to a complete list of flowers, foliage, and evergreens for Christmas floral design.