I keep a journal during the season and designate one page for each plant. I attach the corresponding tag to the page. At the end of the season I separate the tags into two groups, what did well and what didn't. I save these tags so the following year I just pull them out and use them as my reference guide. No struggling trying to remember from one year to the next.
Vegetable tags have to be one of the most important.
Tomato seedlings all look the same, as do many other vegetables. You cannot tell the difference between Beefsteak and cherry or white eggplant and black. I want to know exactly what types of vegetables are going into my vegetable garden. Plant tags, an important tool for the retail centers, they are equally important for your success once you have left the garden center. So don't throw away that small reference tool called a plant tag, it is your free growing guide.