Is it flowers in the sense of buying flowers to send someone an arrangement for a special ocassion or flowers in the sense of gardening and related "green thumb" tips
There are quite a few programs through both Share A Sale and Linkshare that offer gift baskets, flower arrangements, etc. If you sign up for both programs, you can browse through those categories and join the programs.
Most of the programs in that area are easy enough to get accepted into if your site looks good.