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Using plasma to kill airborne pathogens

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Whether it’s cannabis or produce, every grower faces a constant battle against mold and similar threats. Cannabis is particularly vulnerable, as its humid growing environment and the physical structure of its flowers create an ideal breeding ground for many pathogens. Fruit, vegetables and cut flowers, on the other hand, often die in large quantities as they sit in containers or trucks before reaching their final destination.

For the past two years, DDH has been working with an industrial plasma manufacturer to adapt cold plasma technology for controlled environment agricultural and shipping environments. The result is a variety of products sold under the name Quantum Clear (QC).

plasma
DDH’s Travis Higginbotham says the original inventor had used plasma technology in other sectors and was looking for a partner to bring it to agriculture and horticulture. “It took us two full years of design and testing to get the equipment to work in grow facilities, centralized HVAC systems, shipping trailers and cold rooms,” he said. The company has collected data on various USDA fruit crops, third-party air quality testing for 50 different pathogens and volatile organic compounds such as ethylene, and pilot projects with large ornamental and cannabis operators.

© Due Diligence Horticulture

The appeal of this approach, Travs points out, is that the plasma field does not produce ozone, which is a concern with some current plasma technologies. The company has UL and Carb certifications, which verify that there is no ozone and that the units are safe for plant and human workplaces.

Preservation of products
The way it works is pretty simple, practically speaking, at least. Air enters on one side of the device, passes through a plasma area and exits on the other side. In this area, gases are energized into a plasma state that produces reactive oxygen and nitrogen species, including hydroxyl radicals and hydrogen peroxide. These compounds interact with airborne pathogens and organic molecules. “The idea is to create an area in the environment that breaks down the cell walls and changes the structure of certain compounds,” explains Travis.

Fruit storage and shipping environments have been an early focus. “The combination of darkness, low temperatures, humidity and well-packaged produce creates ideal conditions for mold,” he says. “Less air exchange and increased ethylene levels also encourage faster fruit ripening and smoother texture. USDA work with bananas, tomatoes, apples and strawberries showed that shipments treated with cold plasma maintained quality and had virtually no visible mold.”

© Due Diligence Horticulture

Due Diligence Horticulture has designed versions of the unit for shipping containers, refrigerators, HVAC systems and growing spaces. This enables flexibility throughout the supply chain, providing redundancy and centralized air handling.

All of this potential implementation was also based on the company’s focus on safety, Travis noted, not just for the humans working in the grow rooms, but for the plants as well. Several data sets suggested neutral or positive effects on performance and quality, although the company is still gathering more information. “We’ve doubled and even tripled the application capacity without negatively affecting the pistils of cannabis flowers. The technology is gentle on the plant, but destroys pathogens.”

cannabis
For cannabis growers, interest centers on airborne pathogens associated with empty fills, including aspergillus. “Operators also want to cut down on powdery mildew losses or limit the cost and frequency of IPM interventions during flowering. Since plasma treatment can be applied from tissue culture rooms to post-harvest spaces, trials have looked at how the units behave during the crop cycle.” The graph below shows the results of a producer trial in November 2025 where the Aspergillus count was reduced by 90% after 4 days of use.

© Due Diligence Horticulture

Growers of vegetables and ornamentals are also in trouble. Trials in shipping with coastal farms and cooler storage with Metrolina Greenhouses have been completed, and further work is underway in Central American Tissue Culture facilities and other controlled environments with good air exchange.

© Due Diligence Horticulture

Travis emphasized that installation is easy compared to systems that rely on chemical injection. “The units are stand-alone boxes designed for different voltages and room sizes. There is no subscription service attached to the equipment, and the devices come with a standard warranty and optional extended coverage. DDH also offers financing to help manufacturers secure Quantum Clear cold plasma units.”

© Due Diligence Horticulture

In various studies, the company reports an average reduction of 87.2% in airborne pathogens in less than a week and a greater reduction of over 95% when the units are run continuously for up to a month. “It’s a practical tool for growers who want to not only monitor air quality, but better understand air quality management.” he says “He’s responsible for getting the technology into the hands of producers through our testing program and QC to make sure it’s the solution they expected.”

Want to know more? tune in DDH December 10 webinarth at 10:00 a.m. PT. Click here to register.

For more information:
Due Diligence Horticulture
www.ddhort.com

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‘We didn’t cherry pick our submissions”

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Hollandse Hoogtes received seven awards at the 2026 Highlife Cup, five of them in first place, using batches it was already sending to cafes in Holland, rather than material saved for the competition. The works were presented together with coffeeshop Club69 and John&co.

© Hollandse Hoogtes

The difference between LP and equity income
The Highlife Cup is run in lots selected by cafes from months of sales, which leaves room for an entrant to submit their strongest lot. Rick Bakker, CEO of Hollandse Hoogtes, didn’t have much to choose from. “We built our facility to have a harvest every week, so the cycle goes on and on,” says Rick. The company’s production is allocated as quickly as it comes off the line, so what went into the mug was the final version, the same flower that a customer would buy that week. Wins include Crumbled Lime’s first sativa, Zizi’s first indica, Rainbow Zizi’s house favorite, Fruit Punch’s hash and Karma Stardawg third place at WPFF, along with two edible awards.

This is the first year that licensed producers can enter the cup, in their categories, after being excluded the previous year. The jury conducts terpene tests on the entries, and scores put the regulated category above the illegal cafe entries in three of the five flower categories, with both illegal entries scoring higher than the regulated entries. Basic growers had months to select their best material to send, while Hollandse Hoogtes produced a standard weekly production.

Rick spends time in the cafeteria telling the employees where the company is going. “Being number one is a standard, not a trophy,” he says. “What I’m proud of is our people, from farming to hand cutting to logistics, they keep that motivation to be the best and produce week after week.”

© Hollandse Hoogtes

Cafes sold cannabis for decades without lab testing or stable genetics. “Everything we produce has to be tested, and we can consistently deliver consistent quality,” says Rick. “We have mother plants, all the plants come from those selected mother plants. That was unthinkable in the illegal market.” Cultivating all harvests with selected mothers allows the company to put regular production into a glass without worrying about which batch it is.

Genetics and inheritance
Hollandse Hoogtes works with two genetic houses, Karma Genetics and Amsterdam Genetics, both of which have long histories in the Dutch scene, and all of Karma’s breed and selection top positions come from this relationship. “We are very pleased that Karma has supported the start of Hollandse Hoogtes and continues to consult and support us.”

At the start of the experiment, growers got a short window to import cuttings of the developed genetics, which Rick describes as a day or two, when the rules briefly allowed, after which the path was closed. “The selection process now works from seed,” says Rick. When the company sees a gap in the market it selects seeds and conducts a full pheno-hunt of approximately 2,000 plants to judge how ten to fifty expressions of a single genetic grow together with others and the capabilities of the facility. Some basic genetics never worked well indoors, so selection continues.

© Hollandse Hoogtes

Dutch experimental cannabis market
Edibles come out of a kitchen run by a chef, Nicolas Vanderslyen, who spent ten to fifteen years in Michelin-starred kitchens before fully delving into cooking with cannabis compounds. Hollandse Hoogtes combines the flavor of rosin with the flavor of chocolate or gummy, combines its tiramisu praline with Super Silver Sweets rosin for the look of the cake, and the chocolate comes from a luxury chocolate house. Tiramisu Pralines took the first place and Cherry Cola Gummies came third. “We see it as an important category that helps people who don’t want to smoke but want to get the experience,” says Rick.

Hollandse Hoogtes prices in the premium segment. “If you look for the same quality products from coffee shops, you pay 25 to 35 euros per gram for a good type of Gelato, like our Rainbow Bacio (Karma’s favorite for roasting) and we sell that for 12 to 15 euros,” says Rick. In the middle of the market is an average of eight to eleven euros per gram of flower, and at the bottom are greenhouse crops that have not done well indoors, and stock that a grower needs to move, where Rick has seen similar offers for five grams of strain for €22.50.

Demand already exceeds what the company can grow. “Winning awards doesn’t help because the demand will grow,” laughs Rick. The facility opened with ten flowering cells and sixteen are under construction, an increase of close to fifty percent, with flowers from the new cells expected to be on the market in the second quarter of next year. Current cells run on Fluence VYPR LEDs, and in expansion the company plans to test HPS and under-lighting with its own nutrient recipes. In canopy size Rick ranks alongside Hollandse Hoogtes Village Farms after counting the new build, behind CanAdelaar (Cronos), which remains the largest among experimental growers in greenhouse production, while Hollandse Hoogtes is grown entirely indoors, a setup best suited to the Dutch climate.

For more information:
Dutch heights
(email protected)
www.hollandsehoogtes.nl

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DEA Picks Participants For Marijuana Rescheduling Hearing This Month, And Only Opponents Are Invited

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The Drug Enforcement Administration (DEA) has selected participants Hear about the Trump administration’s cannabis reorganization process this will begin this month—and only those opposed to the reform have been invited to participate.

On Thursday, the DEA began notifying parties who expressed their intention to participate that they had been invited to participate, and sending rejection letters to those who were not invited.

The invited participants are:

  • Drug and Alcohol Screening Association (NDASA)
  • Tennessee Bureau of Investigation
  • Smart Approaches to Marijuana (SAM)
  • The states of Nebraska, Idaho, Indiana and Louisiana
  • Voice of the Victims
  • Kenneth Finn, MD
  • Phillip A. Drum, PharmD

All organizations, individuals and officials have come out against marijuana reform, and some have filed lawsuits specifically trying to block cannabis reform.

Supporters of the reform who have expressed their intention to participate have not been invited.

According to several rejection letters seen by Marijuana Moment from cannabis reform advocates, the DEA said they do not meet the definition of “interested person” to participate because they “would not be harmed or harmed by any rule or proposed rule that may be issued.”

In a letter to the Drug Policy Alliance (DPA), DEA Administrator Terrance Cole wrote that the agency has “concluded that you have not demonstrated that you are harmed or harmed by the promulgation of a proposed rule to transfer marijuana, 21 CFR 1308.11(d)(23) 21 CFR 1308.11(d)(23), marijuana as defined in abstracts, 21 CFR. 1308.11(d)(58), and naturally derived delta-9-tetrahydrocannabinols from Schedules I through III of the CSA as proposed in the “Notice of Proposed Rulemaking” (NPRM).

“In fact, you state that the DPA supports the removal of marijuana from Schedule I and ‘does not object’ to the transfer of marijuana to Schedule III. Furthermore, the DPA states that any harm it would suffer from the NPRM would be to schedule marijuana in Schedule III. Because the DPA has not sufficiently demonstrated that the proposed rule itself is harmed or harmed, the DEA concludes that the DPA is not an “interested person.”

“Accordingly, the DEA is denying your request to participate in the hearing,” Cole told DPA.

Cat Packer, DPA’s director of drug markets and law enforcement, told Marihuana Moment after receiving the opt-out notice that “the rescheduling would leave the federal criminalization of marijuana largely intact and falls far short of what the public has asked for.”

“More than 70 percent of this public comments submitted on the proposed rule supported decriminalizationHowever, many patients, consumers, families, small businesses and individuals who have suffered the consequences of the ban — including arrests, incarcerations, family separations, housing barriers, immigration consequences and lost economic opportunities — have been excluded from meaningful participation in these proceedings, he said. dialogue, helping to shape the policies that affect their lives, families and communities.”

Michael Bronstein, president of the American Trade Association for Cannabis and Hemp (ATACH), said his group is “very disappointed” that not a single supporter of cannabis rescheduling was elected.

“The upcoming redistricting hearings will strictly include prohibitionist parties who oppose President Trump’s stance on redistricting. Now it’s up to the Drug Enforcement Administration to defend its rule,” he said.

SAM president Kevin Sabet, meanwhile, said his prohibitionist group “appreciates the opportunity to make our case” at the hearing.

“Rescheduling marijuana would be the biggest drug policy mistake in a generation,” he argued in a statement. “SAM looks forward to presenting the science, data, and public health stakes that show why reprogramming should be rejected.”

The hearingwhich will be overseen by a DEA administrative law judge, will begin on June 29 and conclude no later than July 15.

Acting Attorney General Todd Blanche in April He issued an order that immediately reclassified the state’s licensed medical cannabisas well as marijuana products approved by the Food and Drug Administration (FDA) under Schedule I through Schedule III of the Controlled Substances Act (CSA).

According to a separate order signed by the acting Attorney General, in the upcoming hearing, marijuana III.

In order to be considered for participation in the hearing, the parties had to submit requests, indicating their interest in the procedure, the claims or issues they want to hear and their position on these issues.

“The purpose of the hearing is to ‘receive factual evidence and expert opinion’ on whether marijuana should be transferred to Schedule III of the controlled substance list,” Blanche’s initial statement in April said.

The attorney general will also select an administrative law judge (ALJ) to oversee the proceeding.

“The ALJ’s authority includes the power to hold conferences to simplify or determine the issues at the hearing or to consider other matters that may assist in the expeditious resolution of the hearing; to require the parties to state their position in writing; to sign and issue subpoenas; to compel the production of documents and materials to the extent necessary to conduct the hearing; to examine witnesses; to direct, exclude, or testify; the Rule on Procedural Matters and the President’s DEA Hearing Procedures and Administrative Procedure Actions allowed under the law, Blanch wrote.

Preliminary hearing process on the marijuana redistricting process initiated by the Biden administration It was halted last year amid allegations of improper communications and witness selection.

the current The marijuana redistricting process is being challenged in several ways which have been upheld by a federal Court of Appeals. those pieces of State attorneys general have filed lawsuits against cannabis reform, Opponents of marijuana legalization and a a cannabis-based biopharmaceutical corporation.

Meanwhile, the reorganization of state-licensed medical cannabis is already having a major impact.

The Congressional Research Service published a report on the current rescheduling of cannabis Certified patients with medical marijuana from state licensed dispensaries are now eligible for Class III. “The order appears to allow end users to use marijuana medically without a CSA prescription,” he says.

The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) has published a Draft update to a gun purchase form to recognize the legal status of medical marijuana in the reprogramming. The revised section of the question states that only the “recreational use or possession of marijuana” is federally prohibited, omitting the prior form’s mention of medical cannabis.

The US Treasury and Internal Revenue Service (IRS) said they plan to issued new tax guidelines for the marijuana industry after reprogramming. The reform will benefit state-licensed marijuana businesses by allowing them to take federal tax deductions that are currently prohibited under IRS Code Section III, known as Section 280E.

Even the DEA, which has long opposed cannabis legalization and accused the Biden administration of stalling the initiative in the reorganization process, has done so. It launched a registration process for legal marijuana businesses in the state to take advantage of the federal benefits that come with the reform.

The Department of Transport, on the other hand, issued guidelines stating this use Legal medical cannabis in the state is still no excuse for truck drivers to test positive for drugspilots and other safety-sensitive personnel.

A congressional committee recently Federal officials voted to block further steps to reschedule cannabis.

Read DEA Reorganization Denial the letter To the Drug Policy Alliance below:

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More flexibility to manage light, condensation and UV with extended Solarweave range

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For over 50 years, Solarweave has been a woven covering solution for greenhouse and polytunnel applications. First introduced in the 1970s, it was developed as a sustainable alternative to plastic films and is recognized for its long life, strength and consistent performance.

Designed and manufactured in Australia, Solarweave is designed to withstand demanding growing environments, including high temperatures and high winds. Today, it is used worldwide in many protected cropping systems.

Building on this heritage, GALE Pacific has expanded the Solarweave range with the new D40 and D60 variants, giving growers greater flexibility to manage light, condensation and UV exposure while maintaining the durability that Solarweave is known for.

© GALE Pacific

Light performance optimized for modern grow systems
The extended Solarweave range allows growers to select the right balance of light properties and anti-drip performance for different crops, climates and structures.

Solarweave D40 and D60 gradually increase fog, light diffusion and UV protection. This allows more light to penetrate through the crop canopy and helps reduce plant stress and disease risk in greenhouse environments.

Long life for stronger life value
Unlike plastic films that often need to be replaced every few seasons, Solarweave is used for 15 years or more in greenhouse and polytunnel applications.

This extended service life reduces replacement frequency, labor requirements and downtime during the life of the structure. When evaluated over time, many growers believe Solarweave provides a greater return on investment by avoiding the recurring costs and downtime associated with film replacement and disposal.

Built for real-world production
Solarweave is repairable, allowing localized damage to be repaired on site rather than replacing the entire coating. This is a practical advantage for continuous commercial growing operations.

With decades of proven performance, Australian manufacturing expertise and a wide range of options, Solarweave continues to evolve while remaining a reliable solution for long-lasting greenhouse covers.

For more information:
GALE Pacific
Email: (email protected)
galepacific.com/

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