cbd from hemp plant

Cbd from hemp plant

“Over the past decade, we’ve seen a surge in demand for CBD and we wanted to better understand how plant breeders created high-CBD plants to meet rising demand,” said study co-author George Weiblen, who is a professor in the College of Biological Sciences (CBS) and the science director at the Bell Museum.

“This poses a challenge, though,” said study co-author and CBS graduate CJ Schwartz of Sunrise Genetics. “The genes that allow for the production of CBD are also a bit ‘leaky.’ This can result in about 5% of the product ending up as THC instead of 100% CBD.”

The researchers examined different types of cannabis, including drug-type varieties that produce large amounts of psychoactive tetrahydrocannabinol (THC). Plant breeding has increased the THC level to the point where it can account for up to a quarter of a plant’s total weight. The scientists found that breeding high-THC plants with hemp-type plants can swap a few genes and make a new plant that produces high levels of CBD instead.

After assembling a complete genome from a new breed of cannabis, University of Minnesota and Sunrise Genetics researchers found that high-CBD “hemp” plants have a mostly marijuana genome.

Published in the journal New Phytologist, the researchers found that high-CBD plants inherit about 90% of their genes from drug-type cannabis and the rest from hemp. Traditionally, cannabis plants are split into two varieties: a drug-type grown for psychoactive or intoxicating properties (i.e., marijuana) and a hemp-type used to make industrial products like fiber.

Cbd from hemp plant

Farmers need to know state regulations for testing hemp for CBD and THC. The Nebraska Department of Agriculture (NDA) regulations for industrial hemp production have been approved by USDA. Plant sampling by NDA staff to test for THC needs to be within 15 days before the date of harvest with the grower present during sampling. If the THC level is >0.3% by dry weight, the crop will not meet the legal definition of industrial hemp and need to be destroyed. Again, THC is expected to increase with stressful growing conditions.

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Drying the plant material is a major operation as the water content is high when harvested. To reduce the quantity to be dried and handled for CBD production, the woody stems may be removed for land application, composting or dried separately for fiber production. Artificial drying at up to 100 o F should be continuous flow but the temperature of the plant material should not exceed 75 o F. Suspending plants or branches upside down by wires indoors out of the sun and with good air movement for air drying at up to 75 o F is a common practice if the harvest is not too large.

CBD Demand

CBD varieties have short plants with much branching, growing as squat bushes. The suggested spacing at this time is 2-4 feet x 6 feet. Planting practices may change for higher plant densities when seed supply is sufficient to greatly reduce the cost of seed. Given the high cost of seed, seedlings should be produced in a greenhouse for transplanting. If planting more than five acres, machine transplanting is recommended which may allow transplanting 2 acres per day. Plants can also be produced from cuttings with similar vigor and productivity compared to plants from seedlings. Propagation from cuttings may improve plant uniformity and is a means to all-female plants. The potting mix for greenhouse production of seedlings is important but needs to be well-drained with good available water holding capacity and nutrient supply. The mix probably should include sandy loam soil, perlite, and some organic material.

Figure 1. Hemp variety best suited for CBD production.

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University of Nebraska-Lincoln Extension information typically is based on the interpretation of research information from Nebraska or elsewhere in the Midwest. However, such information is not available for hemp production due to previous restrictions on research in the U.S. This publication relies heavily on research findings from Europe and Canada and learning from growers’ experiences. See more stories in this series at https://cropwatch.unl.edu/tags/hemp.

Cbd from hemp plant

Laws and Regulations

Number of Florida counties with approved hemp cultivation permits

Florida Administrative Code:

Report a Concern About Hemp/CBD

  • Approval Letter from USDA for Florida's Hemp Program [ 201 kB ]
    • Signed Certificate from USDA [ 232.4 kB ]

    Hemp/CBD in Florida

    How We Keep Florida Growing

    Find guidance on pesticide products for use on hemp.

    Encuentre aquí todos los recursos y documentos relacionados con el Programa de Cáñamo Estatal de Florida.