I am in the process of inventory (orchids/plumeria). It is quite a process, particularly with my orchids. Before, I used a color-coded label for each variety but now am going to use a numerical system for each variety, 1-100. That way I can label my "tree-shelves", 1-2-3, 4-5-6, etc. For my single/double plants, I am using the numbers 60-100, and I might have one shelf with a "90-100" label. Then when I sell out of a variety, I can simply use that number for a newly purchased variety. I think this will make finding orchids far easier, particularly since I have over three dozen varieties with only a single or double plant left. Those are always hard to find. With hundreds of orchids, those singles/doubles kind of get lost.