I've heard of a site and cannot think of it.
A site where I can play around with free web graphics. A tool or a game that I can save.
I know bhg.com has something like that. I haven't played with it much however so I can't really tell you how well it works.
You have to sign up before you can get to it but it is free. If you go to the link below you'll see "Plant Finder" under the main photo on that page and below that you'll see "Plan a Garden".
Here is a link that might be useful: BHG -Gardening