Legal THC Threshold Lines
Hemp and cannabis are separated by a THC percentage rather than by species, usually 0.3 percent in the United States and 0.2 or 0.3 across much of Europe. How that threshold interacts with seed sales in different countries is outlined at https://potentthcseeds.com, though local rules still need checking directly. Seeds themselves contain almost no THC, which is why some places permit sale but not germination. It is an inconsistent position that catches people out regularly.