Doubt they x ray domestic packages, since everything from guns to pesticides goes thru.
The issue is, is my package going to reek in Atlanta, while sitting on a hot conveyor belt in a passage for 6 hours?
the way to do it is to stop the smell coming through the packaging and to lable it as something it may look like on an xray.
most of the packages that get stiopped are ones that look dodgy on xray or ones the sniffer dogs picked up
you need a vacumme sealer to double wrap or triple wrap it , thats very important. the other thing you do is send it with a dummy package that will be spotted or smelt, dont make them lookalike, one very differant from the other, and put a small bud in a polly bag that will be found, leaving your second package to go through
As long as it looks good on the outside it goes right down the belt. They never check mine.
However I'm not smuggling anything inside them either lol. Coffee is a good cover up for smell. Get smellproof baggies and bury them in the coffee.
I have some. They're call Quiet packs.. cuz but it's loud af on the inside. lol
you dont need to worry about it with seeds to the uk,i dont think they would spend there time going through post with such a small shadow on screen. you could allways get some small beads and put the seeds in the envalope then, that should give you something that will throw them off