For decades, one number has shaped the global industrial hemp industry: 0.3% THC.
That threshold has determined whether farmers harvest their crops, breeders can commercialize new genetics, and businesses can invest with confidence. Although the figure has become a cornerstone of hemp regulation across much of North America and Europe, it began as a scientific classification developed more than fifty years ago. Over time, that research benchmark evolved into public policy.
Today, governments and researchers around the world are asking whether that standard still reflects the realities of modern agriculture.
A recently published technical paper from Brazil, authored by researchers from Embrapa, Instituto Ficus, Embrapa leadership, and the Brazilian National Industrial Hemp Association, argues that Brazil should build its industrial hemp regulations around agronomy, genetics, climate, economics, and intended use instead of automatically adopting the familiar 0.3% THC threshold.
The recommendation reflects a conversation that is gaining momentum across the global hemp industry.
Agriculture Doesn’t Grow by a Single Number
Industrial hemp is cultivated under an extraordinary range of environmental conditions. Latitude, daylight hours, rainfall, soil composition, genetics, temperature, and cultivation practices all influence plant development, including cannabinoid expression.
A variety bred for northern Europe or Canada may produce different cannabinoid levels when grown in Brazil, South Africa, Peru, Argentina, or Thailand. Researchers increasingly argue that treating one THC percentage as a universal biological boundary overlooks the diversity of agricultural systems around the world.
As commercial hemp production continues to expand, more countries are adopting regulatory frameworks that recognize this variation.
Argentina, Uruguay, Peru, Switzerland, New Zealand, Mexico, and the Czech Republic have adopted or recognized 1% THC frameworks. Paraguay permits 0.5%, while South Africa recently approved one of the world’s most flexible industrial hemp standards by allowing up to 2% THC for crops intended for agricultural and industrial uses.
Discussions are also underway within the European Union about whether higher thresholds should be considered as additional scientific evidence and field experience become available.
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Giving Farmers More Room to Grow
South Africa’s approach has drawn particular attention because it provides farmers and breeders with greater flexibility while preserving a clear distinction between industrial hemp and intoxicating cannabis.
The policy allows breeding programs to develop locally adapted genetics while reducing the likelihood that commercially valuable crops are destroyed because of normal environmental variation. Researchers believe this type of regulatory certainty can encourage investment, strengthen domestic breeding programs, and improve long-term agricultural competitiveness.
The Brazilian technical paper reaches similar conclusions, warning that a rigid 0.3% threshold could increase production costs, discourage innovation, and create unnecessary uncertainty for growers, particularly in tropical climates.
For many industry observers, adopting a 1% THC threshold represents a practical evolution that better reflects biological variation while maintaining clear regulatory boundaries.
The Conversation Is Growing Beyond THC
Some researchers believe the larger opportunity lies beyond selecting a new percentage altogether.
Industrial hemp now serves an expanding range of industries that include food, animal nutrition, textiles, construction materials, paper, composites, biomaterials, cosmetics, pharmaceuticals, and renewable manufacturing.
Each market has its own production standards, safety requirements, and commercial applications, and that diversity has prompted growing interest in a regulatory framework built around intended use.
Under this model, fiber would be regulated as an agricultural commodity. Grain would follow food and feed safety standards. Industrial biomass would be evaluated according to its manufacturing applications. Non-intoxicating cannabinoid ingredients would meet quality, manufacturing, and labeling requirements. Medicinal cannabis would continue under pharmaceutical oversight, while intoxicating cannabinoid products would remain within their own regulatory systems.
The approach mirrors how other agricultural commodities are regulated, focusing on products entering commerce and the risks they present instead of measurements taken from plants growing in the field.
A New Chapter for Hemp Policy
The conversation surrounding industrial hemp has changed dramatically over the past decade.
What was once viewed primarily as a single agricultural crop now supports supply chains spanning agriculture, manufacturing, construction, nutrition, health, consumer products, and the emerging bioeconomy.
As those industries mature, many policymakers are reconsidering whether regulations designed for a much smaller hemp economy remain the best fit for today’s marketplace.
Moving from 0.3% to 1% may offer farmers, breeders, processors, and investors greater certainty while supporting innovation across the supply chain. Yet many experts believe the longer-term objective extends beyond replacing one threshold with another.
For an industry whose applications continue to multiply, regulating according to intended purpose may prove to be the framework that best supports both public policy and agricultural innovation.
