The FY2026 Agriculture Appropriations Act (P.L. 119-37, Division B) amends the statutory definition of hemp in 7 U.S.C. §1639o established by the Agriculture Improvement Act of 2018 (2018 farm bill; P.L. 115-334, §10113). The change to the definition—scheduled to go into effect 365 days after the enactment of P.L. 119-37 (November 12, 2026)—will likely have implications for hemp growers and U.S. Department of Agriculture (USDA) policy. This In Focus discusses congressional actions regarding the definition of hemp, the potential effect of the new definition on the hemp industry, and selected issues for Congress. For the potential implications on the broader consumer product industry and law enforcement, see CRS Insight IN12620, Change to Federal Definition of Hemp and Implications for Federal Enforcement.
Hemp and marijuana are from the same plant species, Cannabis sativa. Generally, growers describe hemp and marijuana as from different varieties or cultivars of cannabis, although regulators have characterized them according to their chemical content. Among the chemical compounds of cannabis are cannabinoids. Cannabinoids include tetrahydrocannabinols (THCs), which are psychoactive cannabinoids naturally contained in cannabis or synthetically created in a lab. Delta-9 THC is the primary psychoactive compound in cannabis though other THCs may be present in cannabis. Other cannabinoids (such as cannabidiol, or CBD) generally are not considered to be psychoactive. For more on cannabinoids and cannabis plants, see CRS Report R44742, Defining Hemp: A Fact Sheet.
From 1970 to 2018, cannabis and its derivatives were generally included in the Controlled Substances Act's (CSA's; 21 U.S.C. §§801 et seq.) definition of marijuana and regulated as Schedule I controlled substances. The 2018 farm bill amended the definition of marijuana to exclude hemp, as defined in the act, thus allowing for hemp cultivation in the United States. In the legislation, Congress preserved the authority of the Food and Drug Administration (FDA) to regulate hemp-derived products.
The statutory definition of hemp from the 2018 farm bill is
the plant Cannabis sativa L. and any part of that plant, including the seeds thereof and all derivatives, extracts, cannabinoids, isomers, acids, salts, and salts of isomers, whether growing or not, with a delta-9 tetrahydrocannabinolic [THC] concentration of not more than 0.3 percent on a dry weight basis.
Some have interpreted the 2018 farm bill definition to mean that products containing 0.3% delta-9 THC or less but that may contain significant amounts of other psychoactive compounds would not be considered marijuana and would legally be considered hemp. This interpretation has been referred to as the so-called "farm bill loophole." In the years following the enactment of the 2018 farm bill, some stakeholders and policymakers raised concerns about the proliferation of products marketed as hemp that contain other cannabinoids, such as delta-8 THC. These products are sold in a variety of formats (e.g., gummies, drinks, candies), with some packaged in containers similar to existing snack food brands. Some of these products contain cannabinoids other than delta-9 THC at concentrations that can make the products intoxicating.
In the 118th Congress, legislation was introduced to amend 7 U.S.C. §1639o to include a total THC limit, rather than delta-9 THC only, and add restrictions on potentially intoxicating cannabinoid products. Two proposals were a House Committee on Agriculture approved farm bill (H.R. 8467) and a FY2025 Agriculture appropriations bill (H.R. 9027, §760). These proposals were not enacted into law.
In the 119th Congress, both the House and Senate committee-reported Agriculture appropriations bills contained hemp provisions that resembled those considered in the 118th Congress (H.R. 4121, §759, and S. 2256, §781), such as including a limit of total THC and adding restrictions on potentially intoxicating cannabinoid products. Congress continued to deliberate whether or not to amend the statutory definition of hemp in the following months. Ultimately, Congress passed the Continuing Appropriations, Agriculture, Legislative Branch, Military Construction and Veterans Affairs, and Extensions Act, 2026 (P.L. 119-37), which amended the statutory definition of hemp as described below. An amendment (S.Amdt. 3941) to remove the hemp provision was tabled during consideration of the bill.
the plant Cannabis sativa L. and any part of that plant, including the seeds thereof and all derivatives, extracts, cannabinoids, isomers, acids, salts, and salts of isomers, whether growing or not, with a total [THC] concentration (including tetrahydrocannabinolic acid [THCA]) of not more than 0.3 percent on a dry weight basis.
While the 2018 farm bill definition of hemp contains a limit of 0.3% delta-9 THC on a dry weight basis, the new hemp definition includes a total THC concentration of not more than 0.3% on a dry weight basis. This change reflects the fact that delta-9 THC is not the only potentially intoxicating THC in the cannabis plant (e.g., delta-8 THC).
The new definition of hemp contains exclusions. As of the effective date of the new definition (November 12, 2026), products excluded by these provisions are not to be deemed hemp products and are instead to be subject to regulation under the CSA as marijuana. To restrict the distribution of certain hemp-derived cannabinoid products, the new statutory definition for hemp excludes
For more on legal considerations surrounding the new hemp definition, see CRS Legal Sidebar LSB11381, Changes to the Federal Definition of Hemp: Legal Considerations Under the Controlled Substances Act.
P.L. 119-37 requires FDA to consult with relevant federal agencies and publish within 90 days of enactment (which, as of May 2026, has not been published)
A variety of stakeholders have advocated for various federal definitions of hemp. Prior to the enactment of P.L. 119-37, the Cannabis Regulators Association and attorneys general in several states expressed a desire for Congress to amend the statutory definition of hemp along the lines of P.L. 119-37. Conversely, hemp industry groups have expressed opposition to the definitional changes in P.L. 119-37 and prefer "regulation" of the market of hemp-derived consumer products through agencies like FDA.
Congress may consider whether or not to further amend the statutory definition of hemp or the definition's effective date. Some proposed legislation would delay the effective date of the new definition of hemp for an additional two years (H.R. 7024, H.R. 7010, S. 3686) or repeal the changes to the definition (H.R. 6209). Other bills, such as S. 2112, would amend the definition of hemp to allow up to a 1% delta-9 THC concentration and make changes to testing and travel requirements or defer to state definitions of hemp (S. 4315). Additionally, some legislation (H.R. 7212, S. 3474) would provide regulatory frameworks for hemp-derived cannabinoid products through FDA.
Congress also may consider amending state/tribal hemp production plans and USDA hemp production plans in light of the new definition of hemp. The Farm, Food, and National Security Act of 2026 (H.R. 7567, as passed in the House) would amend the testing standard to be considered hemp to total THC rather than delta-9 THC. Additionally, the bill would require state and federal hemp production plans to further differentiate between industrial hemp and hemp produced for other purposes (i.e., for cannabinoid uses), such as by designating industrial hemp producers and adjusting testing requirements.
As USDA reworks federal regulations for hemp production over the next year before the effective date of the new hemp definition, Congress may consider the potential effects on farmers, law enforcement, and consumers. For example, Congress may conduct oversight of USDA implementation of the definitional changes in the department's Domestic Hemp Production Program and the impact of the definitional changes on hemp producers.