The Blog will work

I'm pretty sure the online Blog will work. You can add pictures to Blog entries. The real trick is going to be being very aware of using the same keywords when making entries. This is so that you can use the search feature effectively. If you have a tree that you call "My Favorite Elm" you need to always use "My Favorite Elm" in all blog entries. In fact, tree names should be all one word. Searching for "My Favorite Elm" will return every blog entry with the word elm in it. I've given some of my trees alpha-numeric identifiers for use in blog entries.