Sometimes you can't wait for your own flowers to bloom. In these instances it is not only ok, it is recommended that you purchase store flowers. Flower shop flowers, grocery store flowers, flowers from vendors on the street, or internet flowers. Whatever you have to do to get some flowers.
And when you get home with them, you get out the perfect vase and cut and arrange and re-arrange, and stand back and look and smile. I guess if you were in the flower business you wouldn't find the cutting and arranging of flowers so soothing. For me it is very therapeutic.