Hemp and Industrial Crop Production

Hemp is one of the oldest cultivated plants on the continent, and also — after decades of prohibition — one of the newest regulated commodities in American agriculture. This page covers the definition of industrial hemp under federal law, how production systems actually work in the field, the scenarios where growers and processors operate, and the critical decision points that separate compliant hemp from a destroyed crop.

Definition and scope

Federal law defines industrial hemp as Cannabis sativa L. with a delta-9 tetrahydrocannabinol (THC) concentration of no more than 0.3 percent on a dry-weight basis (7 U.S.C. § 1639o, Agriculture Improvement Act of 2018). That 0.3 percent threshold — derived from a 1976 academic paper, not a pharmacological study — now separates a legal crop from a controlled substance. It is a remarkably thin line to farm near.

The 2018 Farm Bill removed hemp from the federal Controlled Substances Act and authorized the USDA to establish a national regulatory framework, which it did through the USDA Agricultural Marketing Service (AMS) Hemp Production Program. States and tribes may operate their own USDA-approved plans or defer to the federal program entirely. By 2023, hemp acres licensed under state and federal plans spanned operations across more than 40 states (USDA AMS Hemp Production).

Industrial hemp is not a single crop in the agronomic sense — it is a category. Within that category sit at least three distinct production types:

Fiber hemp — grown for stem bast and hurds used in textiles, construction materials (hempcrete), and paper
Grain hemp — grown for seed, pressed into oil or sold as hulled hemp hearts for food
CBD/cannabinoid hemp — grown for floral biomass rich in cannabidiol, processed into extracts

Each type has different plant architecture goals, seeding rates, harvest timing, and market channels. They can't simply be swapped mid-season.

How it works

Hemp production begins before a seed goes in the ground. Under the USDA rule at 7 C.F.R. Part 990, licensed producers must submit acreage reports to their state department of agriculture and consent to pre-harvest THC testing within 30 days of anticipated harvest.

Testing is conducted by a DEA-registered laboratory using post-decarboxylation methods or an equivalent approved procedure. The sample includes the top 2 inches of the female plant's flowering material — the canopy, in other words, where THC concentrates. If a sample tests between 0.3 percent and 0.5 percent THC, the producer may request a remediation option (re-testing or destruction of non-compliant material). Above 0.5 percent, the crop must be destroyed (USDA AMS Final Rule, 2021).

Agronomically, fiber and grain hemp behave more like row crops. Fiber varieties are planted densely — sometimes at 250,000 seeds per acre — to encourage tall, thin stalks with minimal branching. Grain varieties are planted at lower densities to allow lateral branching and seed head development. Cannabinoid hemp is managed more like specialty horticulture: lower plant populations, individual plant attention, and female-only cultivation (using feminized seed or transplanted clones) to prevent pollination and maximize flower yield. A pollinated cannabinoid hemp field drops in value dramatically.

The crop production systems that apply to hemp overlap with those used in specialty crops and row crops depending on production type — the diversity is part of what makes hemp genuinely interesting as an agricultural category.

Common scenarios

Three situations represent the majority of hemp operations:

Contract fiber production — A grower signs a pre-harvest contract with a processing facility, plants a certified fiber variety, and delivers whole stalks at harvest. The processor handles retting (biological softening of fiber), decorticating, and sale to manufacturers. Risk is relatively contained because varietals bred for fiber tend to sit well below the 0.3 percent THC ceiling.
Certified seed grain production — Growers produce hemp grain under contracts with food companies or hemp oil processors. Many of these operations integrate into existing soybean or small grain equipment. The USDA programs and services available to commodity row crop farmers — including crop insurance since 2015 under the Federal Crop Insurance Corporation's whole-farm revenue protection — can apply here.
Cannabinoid/CBD biomass production — The highest-margin and highest-risk category. Prices for CBD-rich flower biomass swung from over $40 per pound in 2018 to below $5 per pound by 2021 as licensed acreage nationally exceeded demand (USDA National Agricultural Statistics Service, 2022 Census of Agriculture). Producers who entered this market expecting commodity-level price stability found a speculative market instead.

Decision boundaries

Hemp production forces several decisions that don't have obvious parallels in conventional commodity agriculture:

State plan vs. federal plan — Growers must know which regulatory framework applies in their state. States with USDA-approved plans set their own sampling procedures within federal parameters. States operating under the USDA federal plan follow AMS rules directly.
Variety selection and THC risk — Not all certified varieties carry equal THC risk. High-CBD genetics carry greater THC accumulation risk under stress or late harvest. Checking a variety's Certificate of Analysis history before planting matters more than it does for corn.
Processing infrastructure access — Fiber hemp requires industrial-scale decorticating equipment, which remains sparse outside the upper Midwest. A crop without a nearby processor is a logistics problem masquerading as a farming problem.
Market channel verification — The FDA has not approved CBD as a lawful food additive under the Federal Food, Drug, and Cosmetic Act (FDA, FDA Regulation of Cannabis and Cannabis-Derived Products, 2023). This creates ongoing market uncertainty for the CBD channel that does not affect fiber or grain.

Growers considering hemp as part of a broader diversification strategy would find the sustainable farming practices and specialty crops and horticulture frameworks particularly relevant — hemp sits at the intersection of both. The full landscape of US agriculture that shapes these decisions is covered at the National Agriculture Authority.

References

📜 5 regulatory citations referenced · 🔍 Monitored by ANA Regulatory Watch · View update log