Yeah that is actually true. I think its up-to a $10,000 fine for bringing in a fruit at the airport!!! Even importing a jar of honey will get you into REAL trouble! Not kidding!
i believe it. hawaii is apparently messed right up from non native plants and diseases now.
one of the issues with cannabis seeds is bringing russet mites in with them. they've been known to be able to travel on the seeds. they are microscopic and there is no way to eradicate them once you have them other than scorched earth.
if they find a native host they'll destroy the natural ecosystem easy.