Hemp vs. Marijuana: Legal Definitions and Why They Matter

## The Short Answer "Hemp" and "marijuana" are the same plant species (*Cannabis sativa*) distinguished by a legal threshold rather than a biological one. Under US federal law, hemp contains 0.3 percent or less Delta-9 THC by dry weight; anything above that is marijuana. For adults 21 and older, this distinction matters because it determines which products can be sold federally, which require regulated cannabis licensing, and which fall into the hemp-derived product market. ## The 2018 Farm Bill The Agricultural Improvement Act of 2018 (commonly called the 2018 Farm Bill) federally legalized hemp by distinguishing it from marijuana based on Delta-9 THC content. The Farm Bill: - Removed hemp from the Controlled Substances Act. - Authorized federally-regulated hemp cultivation. - Permitted the interstate commerce of hemp and hemp-derived products. - Left marijuana (cannabis above the 0.3 percent threshold) on Schedule I. ## Where This Creates Gray Zones Products derived from hemp, including CBD oils, certain cannabinoid extracts, and (controversially) Delta-8 THC, THCA flower, and other variants, can be sold in most states outside the regulated cannabis dispensary system. This has produced: - **A widespread CBD market** available in pharmacies, gas stations, convenience stores. - **Delta-8 THC products** sold outside dispensaries in some states. - **Hemp-derived THCA flower** that meets the federal hemp definition on paper but produces a meaningful high when smoked. See [THCA explained](/blog/thca-explained-what-it-is-and-why-its-trending). ## Regulatory Variation by State States have responded differently to the hemp-derived gray zone: - Some have explicitly prohibited or regulated Delta-8 and similar products. - Some permit them to operate under minimal oversight. - Some (New York included) have moved to treat hemp-derived intoxicating cannabinoids under the same frame as marijuana. ## Why This Matters for Consumers For adults 21 and older, the implication: - **Regulated-dispensary products** are third-party lab tested under state cannabis oversight. - **Hemp-derived products sold outside dispensaries** may or may not be tested to the same standard. Quality varies significantly. - **Federal legal status** doesn't translate to product safety or efficacy; legality is a legal category, not a quality marker. ## CBD Specifically CBD extracted from hemp is federally legal. CBD extracted from marijuana is federally illegal but state-legal in cannabis states. Chemically, both are the same molecule. See [full-spectrum vs broad-spectrum vs isolate CBD](/blog/full-spectrum-vs-broad-spectrum-vs-isolate-cbd-which-is-right-for-you). ## Where to Go Next Related reading: [the farm bill and hemp-derived products](/blog/the-farm-bill-and-hemp-derived-products-what-consumers-need-to-know), [delta-8 THC vs delta-9 THC](/blog/delta-8-thc-vs-delta-9-thc-legal-status-effects-and-safety), and [federal cannabis laws explained](/blog/federal-cannabis-laws-explained-where-rescheduling-and-reform-stand). --- *This article is consumer education for adults 21+. Nothing here is medical, legal, or financial advice. Cannabis laws vary by state, always verify your state's current rules and, for health questions, consult a licensed clinician. For regulated New York retail, verify licensing via the OCM QR-code system at [cannabis.ny.gov](https://cannabis.ny.gov).*