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Nighttime humidity is not a problem that needs to be vented away

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Night hours present a persistent and costly challenge for commercial greenhouse operators. When the thermal screens are closed and the ventilations are closed, the greenhouse is closed, trapping the moisture produced by the crop. This creates a high-stakes battle against condensation, disease and unnecessary energy loss. Amir Kandlik, B.Sc. Plant Science and Genetics in Agriculture and agronomist with Drygair explores the critical problem of nighttime humidity and explains the strategic shift from traditional ventilation-based control to a system built around active indoor dehumidification. “This ‘closed greenhouse’ approach improves energy efficiency and supports stronger crop health.”

© Drygair

Night challenge: Thermodynamic and pathological risk
“At night, plants continue to transpire even though photosynthesis has stopped. Without the drying effect of daytime conditions, the air mass in the greenhouse quickly approaches saturation,” says Amir. “Traditional methods rely on ventilation, but ventilation replaces warm, CO₂-rich air with cold outside air. This increases heating demand, destabilizes temperatures and can introduce more moisture, especially in humid weather.”

A variation of this, heating the air before it is vented, wastes energy because the air conditioner is blown out immediately. “In cold, rainy, or snowy conditions, ventilation becomes impossible and humidity increases unchecked. As relative humidity rises above 85 percent and temperatures drop, surface temperatures can drop below the dew point. Condensation then forms on leaves, fruit, and structural elements, creating conditions that promote Botrytis, powdery mildew, and powdery mildew.”

Solution: “Closed” paradigm with active dehumidification.
A more advanced strategy replaces night ventilation with active internal dehumidification, keeping the greenhouse closed. Amir explains that it starts when the unit pulls in moist air, cools it below its dew point and condenses the water vapor into liquid form. “The latent heat released by condensation is captured and recycled, heating the dry air before redistributing it throughout the cottage. Instead of losing heat to dryness, this method converts moisture into heat and creates a net positive energy cycle.”

© Drygair

Basic advantages of the closed night strategy
This approach improves disease prevention by maintaining a stable vapor pressure deficit and preventing dew formation. Keeping surfaces above the dew point significantly reduces disease pressure. Flower tests recorded a 98% reduction in Botrytis when relative humidity remained below 85%. Energy efficiency is also increased because the airfields remain closed and latent heat is recovered during dehumidification. Vegetable producers have reported energy savings of 50%.

“Climate uniformity is improved as constant air circulation removes microclimates, and sealed conditions store CO₂ for uptake at dawn,” says Amir. Crop quality and yield benefit from consistent transpiration and improved movement of nutrients and calcium. Basil had a 15 percent yield increase without downy mildew, and unheated tomato houses had a 25 percent higher yield per stem.

Practical settings for leaders
Adopting this strategy requires changing the operational logic, which is usually handled by a climate computer. “During the day, the vents are open and the natural ventilation manages the humidity, so the dehumidifiers are turned off. At night, when the outside temperature drops below the indoor set point, the vents and screens close, and the dehumidifier operates at an RH of about 75 to 80 percent. The priority is to maintain a dew point range of at least 2 degrees. While heating is used only for temperature stability, nighttime temperatures stay below 10 degrees Celsius. in regions with , an additional defrost coil is required for continuous operation.

Looking at the field results
Field studies show that flowers grown according to this strategy maintained lower relative humidity, achieved significant energy savings and did not require night ventilation. Basil trials showed a 15 percent increase in yield and zero downy mildew. Tomatoes and peppers have seen a 5 to 25 percent increase in yield and a 98 percent reduction in disease. Cannabis growers recorded 30 to 40 percent higher yields with about 50 percent energy savings.

Specific questions about geography and climate
In very cold climates, this view is especially good. Ventilating at minus 10 degrees Celsius creates an extreme heating load, and sealing the greenhouse and dehumidifying the interior retains heat, recovers latent heat and reduces boiler use. In hot and humid climates, night ventilation is unreliable during warm or rainy weather. Active dehumidification removes moisture in a controlled manner, and with additional Air-Water Heat Exchange, the system can heat or cool the air through an external water loop.

Supporting scientific and technical references
Research includes Elad and Shtienberg’s work on Botrytis cinerea, University of Massachusetts Extension greenhouse moisture reduction guidance, Stanghellini’s transpiration studies, and Ho and Adams’ work on water and nutrient uptake in tomatoes.

Without ventilation
“Nighttime humidity is not a problem to be banished, but an imbalance to be managed,” says Amir. “The closed greenhouse strategy treats moisture as an energy resource instead of a waste product. By keeping greenhouses closed at night and using active internal dehumidification, growers can reduce disease, improve energy efficiency, retain CO₂, stabilize the nighttime climate, and increase yield and crop quality. This is one of the most impactful changes in modern greenhouse climate management.”

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EFI Champions Farmworker Recognition Nationwide

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The Equitable Food Initiative, a workforce development and certification organization that partners with growers, farmers, marketers and consumer groups, is encouraging the agricultural community to recognize and celebrate National Farmer Awareness Week with free and impactful tools offered in its communications tools.

Observed annually during the last week of March culminating in Cesar Chavez’s birthday, Farmers’ Awareness Week honors the essential contributions of the men and women who move our food supply chain. From planting and harvesting to packing and shipping, farm workers bring deep knowledge, technical skills and pride to their work every day.

“Farmworker Awareness Week is an important reminder to pause and recognize the highly skilled and physically demanding work that farmworkers do every day to bring healthy, nutritious food to our tables,” said LeAnne Ruzzamenti, EFI’s director of marketing and communications. “Our toolbox is designed to help businesses and communities celebrate their employees and community members and share employee stories that educate consumers about the experience and dedication behind the food.”

EFI’s toolset makes it easy for businesses, retailers, industry organizations, educators and community leaders to show appreciation and raise awareness. The toolkit, available at equitablefood.org/toolkit, includes:

· Social media graphics, sample posts and videos to share

· Posters, technical sheets and printable infographics for offices, shops and workplaces

· A model proclamation to share with local and state officials

· Color a page for children

· Ideas for organizing weekly events or internal celebrations

· And more…

All materials are customizable and free to download, making participation easy and accessible for organizations of all sizes.

Farm workers are not only essential for production, but also essential for farm innovation and continuous improvement. Many bring years, even decades, of experience providing insights that improve quality, efficiency and food safety. Their pride in their craft and their commitment to doing the job well are the foundations for a strong and resilient farming system.

Alexandra Martinez, head of digital marketing and sales at the Equitable Food Initiative, emphasized the importance of industry-wide participation. “We hope that this special week is just the beginning for our industry to shine a light on the experience, resilience and professionalism that our employees provide throughout the year,” said Martinez. “To encourage this, EFI provides resources and reminders to highlight our essential workers with ongoing initiatives like #FarmworkerFriday and other digital tools.”

EFI encourages manufacturers, retailers, brands, allied organizations and consumers to download the toolkit and incorporate its resources into newsletters, in-store promotions, team meetings, classroom activities and community events. By raising awareness and appreciation during Farmworker Awareness Week, the industry can collectively highlight the hard work that sustains our food system year-round.

A free Farmworker Awareness Week Communication Toolkit is available here www.equitablefood.org/toolkit

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Feds Deny Snoop Dogg Request To Trademark ‘Smoke Weed Everyday’ Because Marijuana Is Illegal And Song Lyric Is Too Popular

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Snoop Dogg’s signature phrase “Smoke Weed Everyday” cannot be trademarked by the artist because marijuana remains illegal and the slogan has become too popular in mainstream culture, the US Patent and Trademark Office (USPTO) says.

Dr. ETC Holdco, LLC—the entity affiliated with Snoop that owns his intellectual property portfolio—filed a trademark application for the phrase in 2024. Then, almost two years later, he received a denial letter from the USPTO on Tuesday.

The federal agency under the US Department of Commerce gave two main reasons for the rejection: 1) Goods and services marketed under a trademark must comply with federal law, and “the application includes elements or activities that inherently violate federal law,” and 2) the phrase comes from a “lyric of a song commonly associated with the use of cannabis.”

“To be federally registered, the use of a mark in commerce must be lawful under federal law because the commerce cited in the application complies with applicable federal laws governing the identified goods and/or services,” the USPTO said. “If the goods or services for which a trademark is intended to be used are prohibited by law, the applicant cannot use his trademark in lawful commerce, nor does he have the necessary intent to use the trademark in lawful commerce.”

The letter also explains how certain hemp-related terms and phrases may be eligible for trademark registration, unlike marijuana-related ones, because hemp and its derivatives were federally legalized under the 2018 Farm Bill. However, because the Food and Drug Administration (FDA) has refused to enact regulations allowing cannabinoids such as CBD to be legally marketed as food or dietary supplements, the USTPO said it would deny trademark applications for these products.

The agency’s denial letter also said it denied registration because “the mark applied for is a slogan or term that does not function as a trademark or service mark to indicate the source of the applicant’s goods and/or services and to identify and distinguish them from others.”

“In this case, the requested mark is a social, political, religious or similar informational message that conveys nothing more than adherence to, admiration for, or affiliation with the ideals conveyed by the message,” he said. “Terms and phrases that contain only an informational message cannot be registered.”

To support its case, the USTPO provided examples of the phrase “Smoke Weed Everyday” on various products sold by retailers such as Amazon, Weed Dreams and Red Bubble.

“Because consumers are accustomed to seeing this term or phrase used in ordinary language in various sources, they would not perceive it as a mark that identifies the source of the applicant’s goods and/or services, but only as conveying an informational message.” he said.

Josh Gerben, attorney and co-founder of Gerben IP, he said Snoop’s company denied in a USTPO blog post that it may appeal the decision, but the “most difficult” challenge the case presents is “the federal legality surrounding the sale of cannabis.”

“The application identifies retail services that contain cannabis products,” he said. “Under current Federal law, marijuana remains illegal, and the USPTO routinely declines applications related to illegal goods or services.”

“Taken together, the naysayers create an uphill battle,” Gerben said. “Fortunately for Snoop Dogg, this waiver only affects the registration of the mark … not the activity celebrated by the famous phrase.”

Meanwhile, Snoop has been gradually expanding his cannabis business in recent years. For example, last year, he It brought another direct-to-consumer hemp lifestyle platform to market under his Death Row Records label.

In 2024, the artist also expanded his Smoke Weed Every Day (SWED) brand with a separate retail platform for consumers. sells hemp-derived cannabinoid products, smoking supplies and other merchandise.

This platform also functions as a directory SWED’s physical retail marijuana locations, including the Los Angeles dispensary and a Cafe in Amsterdamboth were announced in 2024.

Snoop, who has referenced marijuana in songs and other performances for decades, has remained a cultural fixture in the cannabis community as the drug has become more widespread. Today, he regularly talks about his relationship with marijuana in interviews and television appearances.

During an appearance on Watch What Happens Live with Andy Cohen in 2024, Snoop confirmed In his entourage there is a staff member who is responsible for keeping people who smoke from getting too highwhen they have reached the limit saying “it is enough”.

It is unclear who Snoop is paying over $50,000 a year to draw blunts for him. Snoop estimated in 2019 that he consumed 81 blunts a day.

in 2024, while the artist took on a new role as a guest meteorologist on the TODAY Showviewers through a custom marijuana-themed weather map featuring the cities of Weed, California and Tokeland, Washington, High Point, North Carolina, and Pottsville, Pennsylvania.

Late night host Jimmy Kimmel acknowledged Snoop’s cannabis legacy in 2023 the artist’s birthday, October 20, was called “a new high holiday”. DoggFather’s Day.

While he may be known as a lavish consumer, Snoop has championed reform, meaning Calling for a policy change in the NBA to allow players to freely use cannabis off the court

He said he supported reform “on the medical side, on health benefits and on opioids and the pills and injections that are given.”

Snoop has long been supporting athletic organizations to adopt soft marijuana policiesoften emphasizing the point that cannabis can serve as a less addictive and risky alternative to prescription opioids.

The artist previously launched another brand of marijuana, called Leafs By Snoop, in Colorado in 2015.

Image courtesy of TechCrunch.

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Lower Sioux Community signs Tribal State cannabis compact

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The Lower Sioux Indian Community is the latest tribal nation to sign a cannabis treaty with the state. The agreement allows the Lower Sioux Community to supply cannabis flowers and products to state-licensed dispensaries and businesses. Eric Taubel of the Office of Cannabis Management says the state and…

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