Patti
. Great idea!
I cut a stalk of immature fern leaf dill that I planned to use that day but never did, and not only did it stay nice in a cup of water on the windowsill, but it continued to mature.
About 10 days later it sported flower heads!
Not sure if this type of dill would be an option for you, Arlene, but it's food for thought for next year.