Late to the party as usual . . . but I wanted to put in my 2 cents about categories, in the spirit of thinking outside the box. Or keeping things simpler?
Instead of categories of plants (of which there are so very many) how about grouping the photos in categories based on . . how to describe it . . distance?
Close-ups (macro) to include tiny flowers, plant detail and insects
Individual bloom, fruit, leaf or seed pod - "cameo" shots?
One plant shrub or tree
Multi-plant groupings
Small garden areas, to include wildlife
Garden scenery, large area, to include wildlife
Just thinking that there's no reason a picture of my orchid can't be judged on its merit against a picture of Ann's daylily, or a picture of an area of a garden in Florida against a garden in the Pac NW. It's not any easier to judge only pictures of, say, daylilies against one another.
