where can i get an arrangement of hibiscus flowers?

Answer 1

hibiscus can be cut from bushes, they are typically not available in the flower markets as a cut flower. It is too cold for any to be blooming naturally, if you do find some when they are in bloom, they have woody stems, so cut them and crack the stems with a hammer to draw water better.

Answer 2

You probably won't unless you make advance arrangements with a very accomplished and well connected florist. The blooms are only open for one day, two at most. The plants are readily available in the spring and are the usual way to go.