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Here's the thing. It is "legal" at the state level but still illegal federally. You need to be 21+.

It's also illegal to smoke it anywhere in public and if you're staying at a hotel, also illegal to smoke it there.

All that is my long winded way of saying, buy at your own risk and understand the consequences of a foreigner getting arrested for this are worse than an American.

don't listen to this guy. it's not a crime to smoke outside, it's a civil fine ("illegal"). you can't get arrested so it doesn't matter where you're from ("foreigner"). and unless you are transporting it to another state where it's illegal you'll be fine ("federal law").

you can just walk in and buy it. def smoke it outside, worst case you will get a ticket if you're being obnoxious about it, probably .01% chance that happens.