Yes, I have seen how a rose from a bouquet of cut flowers has rooted like a cutting and grown into a tall rose bush. The problem is the cut rose is difficult to root without a greenhouse and once it does root the new plant will be a very tall, ugly plant with roses growing on the very top of the bush - because cut roses are harvested from tall shrubs with long stems not traditional rose shrubs like you see in a garden. Your best bet if you want to remember a special bouquet of cut flowers is to visit a nursery and purchase a rose plant that blooms in the same color as the cut roses from the bouquet. Keep growing, Marianne Binetti