What is Hemp (Legal Definition)?

Hemp is legally defined in the United States as cannabis containing no more than 0.3% delta-9 tetrahydrocannabinol (THC) on a dry weight basis. This definition was established in the 2018 Farm Bill (Agricultural Improvement Act of 2018), which federally legalized hemp cultivation and removed it from the Controlled Substances Act. The 0.3% THC threshold is the critical legal distinction between hemp and marijuana. While both are Cannabis sativa plants, anything exceeding this limit is classified as marijuana and remains federally illegal (though legal in many states). This percentage was originally proposed by Canadian researcher Ernest Small in 1979 and became the international standard. Under federal law, hemp-derived products including CBD are legal when produced by licensed cultivators following state regulations. However, the FDA maintains regulatory authority over hemp-derived consumables and supplements. As of 2023, all 50 states have legalized hemp cultivation to varying degrees, though licensing requirements and regulations differ significantly. The legal hemp industry generated approximately $824 million in retail sales in 2021, with CBD products accounting for the majority. Industrial applications include textiles, construction materials, paper, and biofuels. Hemp contains over 100 cannabinoids, with CBD being the most commercially significant. Key legal requirements for hemp include: licensed cultivation, regular testing for THC compliance, seed sourcing from approved varieties, and adherence to state-specific regulations. Violations can result in crop destruction and license revocation. It's important to note that hemp legality varies internationally. While the EU allows hemp cultivation with THC limits up to 0.2%, other countries maintain different thresholds or complete prohibitions. Always consult current federal and state regulations, as hemp laws continue evolving rapidly across jurisdictions.