Have you ever heard of SEM Rush? If not, SEM Rush is a great competitive research tool that can be used to peer into the search volumes of websites other than your own. Of interest in that regard, are the monthly averages of the major floral players:
Teleflora.com - 300.3k a month
Proflowers.com - 755.0k a month
FTD.com - 851.0k a month
1800flowers.com 2680.0k a month
I have a handful of tools that I use everyday, and SEM Rush is counted among them.
Have fun with it!