Here are a couple of ideas. Both ideas would be where the photo gallery is now. Please excuse the drawing, I am not an artist.
#1 This is how I originally envisioned it. Since blooms are what most people want to see first, it would be the default gallery you would see when you open the page. Then you would have tabs across the top to select the gallery you want.
#2 You would have one representative photo from each gallery on the main page, with the title. Click on the photo or title to view that gallery. If there is no photo in a particular gallery the system would assign a generic place holder photo. For the generic photos I would use artwork like our badges, so no one thinks it is that actual plant.
