Lots of good ideas here I like the permanent
marker idea I will have to look for some cause Sharpies ink don't last in the sun, than paint markers came up. Dohhh!!! Why didn't I think of that before I used to use them on skateboards back in the day some I still have with the same paint on them. Great idea there.
Popsicle stick aren't bad either but they fad with time and weather, I thought about putting clear tape over the writing if I use them.
Maps are good too if you don't loose them. I messed up last year doing a map of of my seedlings and mixed up the names but I didn't loose my garden map, still almost all of the variety's were different than marked.
I thought about putting the names in plastic bags tied to the supports for tomatoes this year.
I may do the map with tape and a bag for the triple non screw up like I had last year.