Perhaps this URL should be in the linked repository? I read through it and was waiting to understand what it _did_. I almost gave up, but now that I've seen this, it is exactly what I've been looking for to help manage my outdoor plant "guilds".
I also figure that I could use this to catalogue local wildlife as well to get a sense of what is where, and when. Put that together with particular plants and that's some really nice longitudinal data!
For cataloguing both plants and wildlife, inaturalist.org may be closer to what you're looking for (depending on what you want to do with that information).