I agree, the more pictures, the better. Consider adding shots other than just a blossom, too. It's nice to see some of the whole plant, some of how it fits into a garden bed too. And don't forget seeds and seed pod images. I think they're very valuable additions, and this is the time of year to get those shots. Seedlings too! You might find volunteers popping up in your garden now- get those shots, too.
And.... if you're adding images of things that you've grown in your own yard or home, consider adding some data and comments as you add your pictures. If you've grown it, you must know at least some factoids about the plant.
Karen