I tried Aluminum tags but they split open but stay on, One I find most useful is using brother label maker, I print labels, have labels from 6 years ago and have not faded. Cant speak for Florida that gets a lot of rain, but have not faded in UV dry heat, after 6 yrs in my yard I know what I what, need tags for newer ones as everything I have are cocktail of 10 plus varieties, whether its mangoes, cherimoya, stone fruits, citrus, or avocados. I print long tag and then glue together the two ends around the branch, tag opens as branch gets thicker. However, I will perm tag them at some point, its always good to tag.