If you go to Peru, you can buy coca leaf tea, grown by legitimate companies, sold entirely legally. It’s amazing for adjusting to high altitudes, if you ever go to the Andes, I highly recommend you drink the tea.
There’s huge illegal growing operations, but there’s legal ones. It’s not that hard to grow - I think it likes high altitudes and moisture, but although it’s not as easy to grow as “weed”, I’m pretty sure it’s easier than coffee