UV Sterilization for Cannabis: Does it Work?

Cannabis cultivation, a blend of art and science, requires meticulous care to ensure healthy growth and abundant yields. However, one persistent threat in this journey is the presence of pathogens like powdery mildew and bud mold. Ultraviolet (UV) sterilization has emerged as a potential solution to these challenges. But does it live up to its promise? This comprehensive exploration will delve into various types of UV technology, weigh their pros and cons, and introduce a superior alternative – the AirROS system. By the end, you’ll clearly understand whether UV sterilization is the answer to your cannabis cultivation needs.

I. Understanding UV Sterilization:

UV sterilization uses ultraviolet (UV) light to kill or deactivate microorganisms, including powdery mildew and mold. In cannabis cultivation, three primary types of UV technology are employed: UV-C, UV-B, and UV-A.

A. UV-C Technology:


  • High Effectiveness: UV-C light, categorized as short-wave UV, efficiently eradicates pathogens by disrupting their DNA.
  • Environmentally Friendly: It is a chemical-free solution that is eco-friendly.


  • Safety Concerns: UV-C light can be harmful to humans and plants if not used with extreme caution, necessitating strict safety measures.
  • Challenging Application: Achieving consistent and precise UV-C exposure is difficult, making its application complex.

B. UV-B Technology:


  • Pathogen Control: UV-B technology effectively kills powdery mildew and pathogens.
  • Stimulates Plant Growth: UV-B light can stimulate secondary metabolites in plants, potentially increasing cannabinoid and terpene production.


  • Selective Effectiveness: UV-B’s pathogen-killing ability may not be as potent as UV-C, leaving room for potential outbreaks.

C. UV-A Technology:


  • Safety: UV-A light, categorized as long-wave UV, is safer for humans and plants compared to UV-C.
  • Stimulates Plant Metabolism: UV-A light can stimulate secondary metabolites in plants, potentially increasing cannabinoid and terpene production.


  • Limited Pathogen Control: UV-A’s pathogen-killing effectiveness is limited compared to UV-C, leaving potential vulnerabilities.

II. The Limitations of UV Sterilization:

While UV sterilization has its merits, it also has limitations, especially in cannabis cultivation:

  • Safety Concerns: UV-C can harm plants and people if not managed meticulously, necessitating stringent safety protocols.
  • Selective Effectiveness: UV-B and UV-A’s pathogen-killing abilities may not be as potent as UV-C, leaving room for potential outbreaks.
  • Uniform Coverage: Achieving consistent UV exposure throughout a cultivation space can be challenging, leaving some areas vulnerable.

III. AirROS: A Better Alternative:

Introducing AirROS, an innovative surface and air purification system designed to revolutionize pathogen prevention in cannabis cultivation. Developed using Reactive Oxygen Species (ROS) technology, AirROS offers a superior alternative to traditional UV sterilization.

A. Advantages of AirROS:

  • Effective Pathogen Removal: AirROS efficiently and safely removes subatomic powdery mildew spores and other undesirable pathogens from the air and surfaces.
  • Environmentally Friendly: AirROS transforms contaminants into harmless carbon dioxide and water vapor, leaving no harmful emissions or chemicals.
  • Ease of Use: Simply plug in the AirROS system for 24/7 activation, ensuring continuous pathogen prevention.
  • Comprehensive Coverage: AirROS provides uniform protection throughout the cultivation space, eliminating potential pathogen hotspots.
  • Safe for Plants and People: Unlike UV-C, AirROS poses no harm to plants or cultivators, ensuring a safe working environment.
  • Reaching Shadowed Areas: AirROS is highly effective at sanitizing even hard-to-reach and shadowed areas, leaving no room for pathogens to hide.

IV. Scenario Using UV Sterilization In A Cannabis Grow Room

Imagine a scenario in a cannabis grow room, where UV sterilization struggles to reach every nook and cranny. The room is meticulously set up with rows of flourishing cannabis plants, but lurking in the shadows are the ever-elusive powdery mildew spores.

white spots on cannabis leaves

Despite your best efforts to position UV lights strategically, there are corners where the light’s reach falls short. These shadowed areas become breeding grounds for powdery mildew, threatening the health of your entire crop.

Now, imagine the introduction of AirROS into this scenario. The AirROS system, with its advanced ROS technology, springs into action. It doesn’t discriminate between well-lit spaces and shadowed corners; it treats every inch of the grow room with equal efficiency.

As the AirROS system operates silently, it transforms those elusive powdery mildew spores into harmless carbon dioxide and water vapor. The result? A pathogen-free environment where your cannabis plants thrive without the shadow of contamination.

V. Conclusion: Elevating Pathogen Prevention:

In the world of cannabis cultivation, where pathogen prevention is paramount, it’s crucial to consider the limitations of UV sterilization. While UV technology does kill powdery mildew and pathogens, it comes with significant safety concerns and limitations in coverage.

AirROS emerges as the solution to these challenges. With its ability to sanitize even the most challenging areas, AirROS complements UV technology and offers a holistic approach to pathogen prevention. By embracing AirROS alongside UV lights, cultivators can achieve a higher level of protection and ensure their cannabis crops remain healthy and uncontaminated, from the brightest spots to the darkest corners of their grow rooms.

VI. How AirROS Maximizes Pathogen Prevention:

AirROS stands at the forefront of surface and air purification, utilizing a groundbreaking approach that harnesses the power of Reactive Oxygen Species (ROS). This innovative system operates in two crucial phases, providing comprehensive pathogen prevention for your cannabis cultivation environment.

Phase 1 – Primary Air Cleaning:

When placed within your grow room’s air circulation system or greenhouse, AirROS becomes the first line of defense. As air containing microorganisms from the surrounding environment enters the purifier’s internal chamber, a remarkable transformation takes place. The heart of the system, the reaction chamber, generates ROS. These Reactive Oxygen Species consist of five highly reactive components: atomic oxygen, singlet oxygen, hydroxyl radical, superoxide, and peroxynitrite. It’s these ROS that become the unsung heroes in the battle against pathogens.

As the air passes through the reaction chamber, these ROS come to life. They target and break down carbon-to-carbon bonds, effectively sanitizing the air. Bacteria, molds, viruses, and other pathogens are swiftly neutralized, ensuring that the air entering your cultivation space is pristine and free from potential contaminants.

Phase 2 – Secondary Surface & Air Cleaning:

The journey doesn’t end with primary air cleaning; it extends to the ongoing sanitation of both surfaces and the surrounding air. The purified air, now infused with longer-lived Reactive Oxygen Species, continues to work its magic. These include gas-phased H2O2 (hydrogen peroxide) and low-concentration levels of O3 (ozone).

In this phase, AirROS goes beyond treating the air that passes through the reaction chamber. It diffuses H2O2 and O3 into the environment, creating a two-pronged attack on pathogens. These ROS work tirelessly to sanitize the room air and all exposed surfaces. In doing so, AirROS ensures that your cultivation space remains a pristine, pathogen-free environment 24/7.

VII. Seamless Integration with Your PLC:

To provide you with full control and monitoring capabilities, AirROS integrates seamlessly with your Programmable Logic Controller (PLC). This integration is facilitated through an optional RS-485 extender box, which delivers analog signals to your PLC for remote sensor readings via Cat5e Shielded cable and our RS485X Box extender box located at the PLC.

The integration empowers you to remotely control and manage the AirROS system. The sensor, a dynamic environmental monitor, continuously assesses the conditions, providing new readings every 72 seconds. Using Proportional-Integral-Derivative (PID) controls, the system automatically adjusts its multiple stages to maintain the desired ROS set point, ranging from 10 parts per billion (ppb) and up to 30 ppb.

The controller offers a comprehensive view of system performance, displaying the last ppb reading and average O3 ppb levels. It also provides manual controls, allowing you to fine-tune power factor percentages, setpoint settings, and more. Should ROS levels exceed 30 ppb, the system will adjust the Power Factor to ensure optimal performance.

In summary, AirROS’s advanced technology doesn’t merely sanitize the air and surfaces; it actively monitors and manages sanitation levels in your cultivation environment. This dynamic control is essential for adapting to varying activity levels and bio loads, ensuring that your cannabis cultivation space remains a bastion of cleanliness and pathogen prevention, even at extended distances from the purifier.

As you explore innovative ways to safeguard your cannabis crop, there’s no better time to embrace the future of pathogen prevention. With AirROS by your side, you not only eliminate the risks associated with UV technology but also enhance the health and productivity of your plants.

Take action now and elevate your pathogen prevention efforts with AirROS. Discover the difference today!


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