RickCorey said:There is something called a "phyto-sanitary certificate". The seller has to fill it out and (I guess) get it approved by their government, which must involve some kind of inspections - or maybe just paperwork and paying a fee.
There is an inspection of the plants for pests and diseases that are specified depending on the country, and even locality within a country, to which the plants are destined. If the plants pass the inspection then the inspector issues the phytosanitary certificate that must accompany the shipment. In some cases the recipient needs to get an import permit also.
For seeds, some countries allow small lots of certain seeds without a phyto but may require an import permit.
It all depends on the requirements at the receiving end regarding what plant problem issues are known at the sending end.
