Just be aware that plastic knives and mini blinds often get rearranged or stolen completely by crows, squirrels, and other wild critters. I have recently gone to the metal name tags, and have only had one completely pulled out of the ground so far. I still use lots of the discarded mini blind slats, and a number 2 lead pencil to write on them with, but I plan to buy more of the metal name tags. I am sure I will always have lots of the mini blind labels in the garden, but the main plants will one day have all metal name tags that will stay where I put them.
