I keep a sort of visual journal by constantly taking pictures of plants, including baby seedlings. The pictures and their associated dates allow me to visually check and confirm progress and setbacks. I rely on the database here to help keep my pictures organized by name and to easily find the ones I'm looking for later. Some of my "journal" pictures here...
https://garden.org/plants/brow...
My only written notes relate to acquisitions, repotting dates (large container garden here), and where relevant, deaths and their suspected causes. For what it's worth, that information is all pretty useful to me.
