Almost every legal system that controls magic mushrooms does it by controlling psilocybin and psilocin, the compounds in the fruit body. Spores contain neither. That is why spores sit outside the drug laws in many places, while growing them, which produces the controlled compounds, is an offence almost everywhere.
Psilocybin and psilocin are Class A drugs under the Misuse of Drugs Act 1971, and section 21 of the Drugs Act 2005 made it explicit that fresh mushrooms containing them are covered as well as dried or prepared ones. Spores are not. They are lawful to buy, sell and possess for microscopy, taxonomy and research. Cultivating them is production of a Class A drug.
Our journal article on UK spore law walks through the statute in detail.
Psilocybin and psilocin are Schedule I substances under the Controlled Substances Act. Spores contain neither and are not scheduled, and the DEA has confirmed in correspondence that spores which contain no psilocybin or psilocin are not controlled substances. Cultivation is a federal offence.
Most states follow the federal position. Four do not:
Elsewhere, intent matters. Even where spores are lawful, evidence that they were bought to germinate can bring state cultivation laws into play. Several states and cities, Oregon and Colorado among them, have changed their laws on psilocybin itself in recent years without making spores any less lawful or any more.
Outside the UK and the US the position is far less settled. In Canada spores are widely sold and generally regarded as outside the Controlled Drugs and Substances Act because they contain no psilocybin, though that reading has never been tested the way the UK and US positions have. In Ireland, psilocybin mushrooms have been controlled since 2006 and the status of spores has not been clearly addressed. Across mainland Europe the law varies country by country. If you are outside the UK, check your own country's law before you buy.
We supply spores for microscopy, taxonomy and research, to adults, and we do not sell cultivation equipment or give cultivation advice.
We do not ship to California, Georgia, Idaho or Florida. Checkout refuses any order to an address in those four states, whatever is in the basket, including microscopy equipment. If you live anywhere else that prohibits spores, they are not lawful for you to buy, from us or from anyone else.