Yeaah, that is a nice way to do it. My wife has a labler. Makes words in plastic strips. I was hoping there was some way to make them in metal that I could stick in the ground.
Maybe I could check with ACE hardware or somebody.

I have an outdoor garden. I have about 300 cacti. Is there an easy way to tag each cactus with it's name?
I have tried different ways but the letters last only a year.
I'd like a tag I can stick in the ground near the cactus the letters of which will last last until I die.

I had prepared a long response to your post, but accidently deleted it. Just let me say, nice job!