If you're going to order from their web site, you need to look up the address of your hotel first. Even though the Disney Florist is an actual part of Walt Disney World, they use the standard FTD web site software, which insists on an actual delivery address. I wish there was, but there's no drop-down list to select which of the WDW resorts you want it delivered to.
I usually put my resort reservation number in the comments block. The resort will leave Disney Florist items in your room for you.
I also learned the hard way that they have rules on what they'll put on the gift cards. One year, I put in the web site that I wanted the card to say, "Welcome home! Have a wonderful vacation. Love, Mickey and Minnie" They called me on my cell phone and said I couldn't have it signed by Mickey and Minnie. They changed it to "Your Disney Pals"
Something from the Disney Florist has turned into a tradition for us. I order one for every trip. When we do a split stay, it comes on the bus with us from one resort to the next.
I don't have pictures of all of them online, but here's a sampling of some of the flowers I've ordered from them over the years...
2006
2007
2008
2009
2011
(With our Not-So-Scary loot)
2012