Roses are perennials that bloom every year, unlike annuals that bloom for only one season and then die. Roses come in a myriad of colors except true blue and black. If black roses are required for a centerpiece or Halloween holiday decoration, for example, the choices are silk roses or using dye or floral spray on dark red roses.
Cut 1 inch off the stems of the roses and place them in ice water for one hour. This freshens the flowers so they last longer in an arrangement.
Put on disposable latex gloves and pick up the rose.
Spray the rose with several light coats of floral spray. Turn the flower and mist it using both an up and down stroke and back and forth. Remember to spray the top of the rose as well.
Let the spray dry between coats. Floral spray has an odor that should dissipate in 24 hours.
Professional floral dye is better than food coloring from the grocery store. Black is obtainable from cake decorating sources. Black watercolor paint works, but will take quite a bit of the dry watercolor to get the flower to black rather than gray.
Mix the dye with the water as the dye directions suggest.
Cut off 1/2 inch from the stems of the roses and place in the water.
Leave in the water until the rose is black.
About this Author
Katie Rosehill holds an MBA from Arizona State University. She began her writing career soon after college and has written website content and e-books. Her articles have appeared on GardenGuides.com, eHow, and GolfLinks. Favorite topics include personal finance - that MBA does come in handy sometimes - weddings and gardening.