I couldn't see any way for me to specify my location, to ensure I could actually buy the plants.

Upon clicking one of the plants, I see it was only American sites.

I get that this is just a hobby for the moment, but even if there was just a note somewhere, "USA only", that would have been appreciated.

It still irks me how Americans tend to treat the other 96% of the world as though we don't even exist on the same planet; that we're some sort of exotic tourist destination, or a spawn point for immigrants.