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How Humidity Affects Greenhouse Energy Usage

Dealing with high humidity in the greenhouse, or indoor grow room, can take a lot of energy. Especially if you rely on ventilation and heating to control humidity. But humidity control doesn’t have to be so energy intensive. Using a dehumidifier designed for horticulture will extract water from the air with much greater energy efficiency,[..]

Why Greenhouse Dehumidifiers Aren’t Effective When Using Wet Pad and Fan Systems

Evaporative cooling, such as wet pad and fan systems, is common in greenhouses in warm regions. Growers often ask if, and how, dehumidifiers can work in conjunction with wet pads. The short answer is – they shouldn’t run simultaneously. Pad and fan systems and dehumidifiers have opposite functions, making them negate each other’s operation: Dehumidifiers[..]

Drygair’s First Customer in the Netherlands Equips Entire Company with Drygair Units

Kwekerij Marcel Vijverberg, a greenhouse horticultural company in Maasland, Netherlands, equips all facilities with DryGair dehumidifiers. The company grows potted plants and, in spring, mainly hanging and terrace plants. The range consists of more than 55 different varieties in colorful pots. Sustainability is of the utmost importance in his company. Using the latest techniques, energy[..]

How Humidity Control Improves Nutrient Transport in Plants

There are many factors that affect plants’ ability to take in nutrients and spread them to the cells within the plant. One of the most effective ways to improve nutrient transport is humidity control. What is Nutrient Transport? Plants are living organisms. Like any living being, they break down nutrients in order to grow and[..]

Controlling Humidity, Saving Energy and Improving Yields – by NZGrower Magazine

NZGrower recently published an article on how Southern Belle Orchard in Matamata, NZ use DryGair dehumidifiers to gain full control over their greenhouse humidity, reaping unexpected benefits in the process. Controlling humidity in greenhouses improves crop quality, increases yields and saves energy. Read the article here. We would like to thank Royal Brinkman Australia[..]

Why HVAC Isn’t Enough for Grow Room Humidity Control

Whether you’re incorporating a new HVAC system in your grow room, or suffering from uncontrolled humidity, despite constant HVAC operation – you can achieve a better climate, at a lower cost, by integrating a dehumidifier. HVACs aren’t designed for humidity control HVAC systems are designed for temperature control in industrial or residential environments. Though a[..]

What is the Problem with Night Time Humidity?

Night time humidity control is critical in greenhouses and grow rooms. Most plants transpire water during the night, as well as during the day, which leads to high relative humidity. This poses a threat of disease outbreaks and molds forming in almost any crop – including vegetables, flowers and cannabis. This is a problem that[..]

Preventing Downy Mildew Without Fungicides

Downy mildew is a very common mold, present around the world in greenhouses and grow rooms. It’s a humidity related fungal disease, caused by a family of different oomycetes. While symptoms are slightly different, it’s often misidentified as powdery mildew or gray mold. Mildew affects a wide variety of crops – vegetables, like cucurbits (cucumbers),[..]

How to Reduce Greenhouse Light Pollution

In many places in N. America and Europe, residents are complaining about light pollution, in the form of bright purple lights covering the nighttime sky. These strange lights aren’t a mystery, they come from greenhouses. Most commonly, cannabis greenhouses. These complaints are now moving many counties and towns to regulate greenhouse light pollution. Luckily, reducing[..]

Are Dehumidifier Water Meters Essential for Greenhouses and Grow Rooms?

The water balance of a greenhouse, or any growing space, is one of the main ways to measure and understand plant activity. The only way to truly gauge the water balance of your growing space, is by using flow meters to measure all your inputs and outputs, including a dehumidifier water meter. This is an[..]

Implementing Sustainable Development Goals in Horticulture and Greenhouse Cultivation

In 2015 United Nations Member States adopted the 2030 Agenda for Sustainable Development. The agenda provides a blueprint for a sustainable future, by setting 17 Sustainable Development Goals (SDGs). We, at DryGair, fully support the adoption of SGDs. As an agri-tech company that develops energy-efficient dehumidifiers, we’ve been championing sustainability in horticulture since our inception.[..]

What is the Best Method for Indoor Humidity Control?

Indoor growing is one of the fastest growing sectors in agriculture. There are plenty of good reasons too. Growing indoors provides full control over the environment, letting growers grow their crops year-round, regardless of season, always maintaining optimal conditions. But indoor cultivation has its challenges. Grow room climate control, as opposed to greenhouses, means completely[..]

Greenhouse Humidity Control – Fall and Winter Tips

Fall is already here. The colder temperatures and shorter days have a huge impact on greenhouse climates, and how to control it. So we put together a few tips for greenhouse humidity control in the fall and winter. When it’s cold outside – close the greenhouse! Lower outdoor temperatures lead to higher outdoor relative[..]

Designing an Energy Efficient Greenhouse (feat. Hortinergy)

Growing in a greenhouse has many benefits. The ability to harness natural sunlight, while still controlling the environment is critical for modern cultivation. But operating a greenhouse is energy intensive, especially when they aren’t designed to be energy efficient. Designing a greenhouse is complicated. There are numerous factors to consider and they’re often complicated and[..]

Why Drying Rooms Need Dehumidifiers

Drying rooms are an integral part of cannabis production. Post-harvest flowers still contain approximately 80% water. This water needs to be removed before the dry buds can be sold or provided to patients. Drying Rooms Need Humidity Control Dry rooms are built to remove the excess humidity in plants, after harvest. Though the buds are[..]

Why Dehumidifiers are Complementary to Greenhouse Lights

Growers around the world use lights to increase their production. Indoor grow rooms require artificial lights as a substitute to sunlight. But many greenhouse growers use artificial lights as well, to lengthen the day, increase radiation intensity or to increase the amount of light on cloudy or rainy days. There’s good reason to add lights[..]

What is Plant Empowerment

Plant empowerment, often referred to as “Next Generation Growing”, is an integrated approach to cultivation, developed in the Netherlands. This approach prioritizes the plants, providing them with the best conditions to optimize photosynthesis, in turn maximizing plant growth and health. Growing with plant empowerment is data-driven, utilizing sensors and plant measurements in combination with knowledge[..]

Radiation, Transpiration, Leaf Area Index, and Everything in Between

Radiation, or light, is a major factor in designing complex growing environments, as it affects all other climate parameters. This post will cover: The light spectrum Components of PPF – photosynthetically active radiation Greenhouse lighting types Radiation for cultivation in growing facilities Radiation intensity and evapotranspiration Cannabis and lighting types Light Types The visible light[..]

How Agriculture May Help Alleviate Crises Like Covid-19

Greenhouse cultivation, with a controlled environment, lets us produce food year-round, regardless of seasonality. This may be the key to maintaining food security during these tough times. Crises such as the covid-19 outbreak are unexpected, yet inevitable. Global attempts to stop its spread have slowed down much of the world’s economic activity, affecting both global[..]

How to Reduce Greenhouse Humidity – Ventilation, Dehumidification or Fans?

Controlling and reducing greenhouse humidity is one of the greatest challenges of modern commercial agriculture. Though it’s a much-discussed topic, it is also a complicated one. Growers often ask about the differences between dehumidifiers, fans and ventilation, in regard to controlling humidity in the greenhouse, struggling to find what best fulfills their needs. Though all[..]

Do Plants Grow Faster with Humidity Control and Air Circulation?

Climate control is an integral part of modern cultivation. You can find these systems in greenhouses, indoor growing spaces, hydroponic operations, vertical farms and more. In most cases, this includes humidity control and air circulation, which drastically reduce disease outbreaks and crop loss. But besides combating humidity diseases such as powdery mildew or bud rot,[..]

DG-12 & DG-6 EU Highlighted in 5 Novelties Not to Miss at IPM Horticulture Trade Show

Hortidaily covered the launch of the new DG-12 & DG-6 EU units during the IPM trade show in Essen, Germany. “DryGair will launch new dehumidifier units under the names DG-6 EU and DG-12 EU on the IPM. These comply with the European refrigerant gas used in the machines. “We would previously use a gas called[..]

8 Ways to Reduce Greenhouse Heat Loss

One of the biggest energy expenses, for many greenhouses, is heating. Understanding how to minimize heat loss, while maintaining optimal climate conditions, is the key to reducing energy expenses. This rings especially true during cold nights or during the winter. When the temperature drops, heating becomes critically necessary, often working non-stop. There are many ways[..]

What are the Optimal Humidity and Temperature Set Points for Greenhouse Growing?

The Ideal greenhouse temperature and humidity set points are: Relative humidity level around 80% Temperature range of 18ºC – 24ºC (night – day, 64ºF – 75ºF) Ideal Humidity for Greenhouses – Why ~80% Relative Humidity? Relative humidity is a critical climate parameter in the cultivation of any crop. So most growers aim to maintain the[..]

How Plants Affect Greenhouse Humidity Control

Greenhouse humidity control is unlike any other industrial setting. This is due to the unique relationship between the plants and the air. Exposure to differing conditions throughout the day and over different seasons further differentiates the two. Humidity control in greenhouses and indoor growing facilities is a necessity. Untreated humidity, in such settings, leads to[..]

Using Humidity Control & Monitoring as Growing Tools

We recently wrote about using humidity control & monitoring as growing tools for Maximum Yield “…No matter how unintuitive humidity may be, its effects on crops are dramatic and often detrimental. This has led to the current state of humidity control in agriculture, which is under-informed, inaccurate and is usually either under or over-invested in.[..]

Humidity: The Overlooked Climate Factor That Could Be Hurting Your Plants’ Growth

We recently wrote about humidity control in greenhouses and growing facilities for “Maximum Yield”. “Modern cultivation is characterized by a constant drive to improve production. This is achieved, for the most part, by controlling and optimizing the climatic conditions in the growing space in order to provide the best conditions for plant growth. The most[..]

Interview With a Cannabis Grower – Published in Cannabis Business Times

This interview with agronomist and cannabis grower, Elad Spiegel, was originally published in Cannabis Business Times’ February 2019 Dehumidification printed edition. “I promote the use of DryGair as a focal point in my cultivation environment designs by leveraging its dehumidification, high capacity airflow distribution, and heating & cooling capabilities.” These were the words spoken by[..]

Preventing Botrytis Without Fungicides

Botrytis, also known as gray mold or bud rot, is an extremely common humidity related disease, found in greenhouses around the world. With over 200 known species, this fungal pathogen affects most fruits and vegetables, as well as ornamentals and cannabis. Preventing botrytis is key for many different agricultural sectors. Botrytis’ Effects and Symptoms Gray[..]

Air Circulation – Greenhouse Climate Control

Greenhouse growers constantly monitor, regulate and adjust their climates. These operations happen in large spaces, meaning large volumes of air. So how is everything optimized everywhere all at once? The answer is greenhouse air circulation. Between HVACs, fans, vents, windows and other climate control systems, air moves. In most cases, growers do not factor the[..]

Preventing & Treating Powdery Mildew Without Fungicides

Powdery mildew is a humidity related fungal disease caused by a range of fungi species. It is an extremely common mold, found around the world. This mold affects solanaceous crops, such as tomatoes and peppers, as well as cucurbits, including cucumbers and melons. It is also a common problem in cannabis cultivation. Powdery Mildew’s Effects[..]

What is Leaf Area Index?

Leaf area index, or LAI, is a metric growers use to measure the amount of foliage in canopies. It is determined by the coverage of leaves per unit of the ground surface. Or in simpler terms, LAI measures how many layers of leaves are in a m2 of surface. What does the leaf area index[..]

How DryGair Dehumidifiers Are Changing The Cannabis Industry

We recently spoke with WeCannect about how humidity control is changing the cannabis industry. “We spoke with DryGair’s Hadar Fuchs-Rubal to learn more about the company’s equipment, origin story, and mission to eliminate botrytis and other contagions from growing areas, as well as the changing legal status of cannabis in Israel.” Read the full[..]

What is Integrated Pest Management?

Integrated Pest Management (IPM) is an ecosystem-based approach to pest and disease control in modern agriculture. Focused on long-term management, IPM combines different techniques in order to effectively control pest related damage. Additionally, IPM considers and aims to minimize financial, environmental and human health costs. Rather than using pesticides to eliminate pests when they’re[..]

What is VPD – Vapor Pressure Deficit?

Vapor pressure deficit (VPD) is one of several methods growers use to measure humidity in a greenhouse and gauge its impact on plant development. Vapor pressure deficit measures the difference, in terms of pressure, between the air’s water content, and its saturation point – the maximum amount the air can carry at its current temperature.[..]

Next Generation Growing – 7 Principles for Plant Empowerment

Plant Empowerment, or Next Generation Growing (NGG), is a set of environmental control techniques for greenhouse or glasshouse cultivation, developed in the Netherlands over the past decade. NGG aims to achieve two goals. The first is to improve plant growth by improving conditions for photosynthesis and enhancing plant health. The second is to minimize the[..]

Understanding the Connection Between Greenhouse Radiation & Humidity

Humidity is a common issue in agriculture, whether in an indoor growing facility or greenhouse. As any parameter in such an environment, humidity relates to numerous others factors. In this article we will discuss an important piece of the puzzle – how radiation affects humidity. Relative Humidity & Transpiration In order to understand transpiration, radiation,[..]

Greenhouse Tips From Our Experts – Growing With Dehumidifiers for Humidity Control

We interviewed our talented experts about what they know best – agriculture and dehumidification. For years they have been teaching and advocating for smarter, more efficient agriculture in greenhouses. With the DryGair solution they have brought their vision to life. A vision for controlling humidity in a way that both saves tremendous amounts of energy, and[..]

Dehumidification is Key in Cannabis Cultivation

DryGair’s Hadar Fuchs-Rubal spoke to MMJDaily regarding the importance of dehumidification in cannabis cultivation. The interview was published on MMJDaily on 5/2/2019 A great number of medical cannabis operations are carried out within greenhouses or indoor environments. Unlike outdoor grows, these types of operations come with whole different sets of issues that require to be[..]

What to Look for in a Greenhouse Dehumidifier

Whether growing in a closed greenhouse, semi-closed greenhouse, or completely indoors, adding a dehumidifier is a key step to increasing efficiency, reducing costs and boosting the yield and quality of your crop. Buying new equipment can be daunting. So we put together a checklist of the top factors to consider when shopping for a greenhouse[..]

Controlling Water & Climate Conditions – Hydroponic Agriculture Series Part 3

Hydroponic agriculture can be extremely efficient, but also easily disrupted. The key to a successful hydro operation is in maintaining the correct conditions of both water and air, while keeping a close eye on changes and fluctuations. If you’re new to hydroponic farming, check out our previous articles: Part 1 – Introduction to Hydroponics and[..]

Hemp – Uses, Cultivation and Drying

Hemp refers to strains of cannabis sativa with very low levels of THC. Usually under 0.3%, too low for commercial recreational use. Regardless of the lack of THC, many consider it a super-crop, with an especially wide range of uses. Cannabis is undergoing a cultural shift, especially with a comeback from illegality in the U.S.[..]

Homogeneous & Consistent Climate Control with DryGair Dehumidification

This is a DryGair article contributed to the Cannabis 2020 magazine. Bud rot, powdery mildew and Alternaria are some of the most dreaded words in cannabis cultivation. Destructive diseases caused by even brief periods of high relative humidity, which in a greenhouse environment, could be every night. The best way to avoid these problems, is[..]

Desert Agriculture at Arava R&D

The Arava region is part of the Israeli desert, and home to the “Central & Northern Arava-Tamar R&D Center“. Arava-Tamar is a world leading agricultural research facility. Once a year the center opens its gates to visitors. So we headed to the desert to witness new developments in desert agriculture. Arava Agriculture R&D The Arava[..]

DryGair Units Now Available on Frames Above the Crop

The full article is published on FloralDaily “Moisture problems in the greenhouse have always existed, but certainly in winter it is a challenge for many growers to dehumidify their greenhouse air. Previously the motto was: heating, open screen and the ventilation windows open. But that is not very energy efficient, and a lot of valuable[..]

Why Humidity Control is Necessary in Cannabis Cultivation

Cannabis humidity control is a major talking point among growers. In the modern era, cannabis is grown in completely controlled spaces. Greenhouses, as well as closed indoor facilities are constantly monitored and adjusted. The aim is to maintain a consistent quality of product, while attempting to maximize yields. Though humidity is a big part[..]

California’s Legal Recreational Marijuana Industry – 2018 Recap

The first year of legal recreational marijuana in California has come to a close. It’s time to breakdown the trends and see what the future holds. A Breakdown of California’s Marijuana Industry Recreational marijuana, or “adult-use” cannabis, as the industry coins it, is legal in the state of California as of January 1st, 2018. During[..]

DryGair Wins Innovation and Sustainability Prize – TSW 2019, Poland

DryGair & Royal Brinkman win Prof. Pieniazek’s Prize at TSW 2019 Poland’s TSW is the biggest Fruit and Vegetable Industry Fair in Central and Eastern Europe, providing the most innovative and current knowledge and know-how in horticulture. As part of the annual conference, the Prof. Pieniazek Prize is awarded to the most innovative and beneficial[..]

Advantages & Disadvantages – Hydroponic Agriculture Series Part 2

Hydroponic farming techniques may vary, as we covered in our previous article – How it Works – Introduction to Hydroponics Agriculture Series – Part 1, but the basic underlying principles stay the same. Growing without soil brings with it many advantages, but not without obstacles to cross, and costs to bear. In this article we[..]

Greenhouse Heating, Coal & Dehumidification – A Breakdown

Heating a greenhouse is one of the most basic aspects of modern agriculture. But we still use antiquated, polluting heating methods. Even in countries we consider to be at the forefront of both technology and environmental awareness. This article was originally featured on www.hortidaily.com Greenhouse Heating Modern agriculture enables year-round growing in regions where nature[..]

How it Works – Introduction to Hydroponic Agriculture Series Part 1

Hydroponic agriculture, as the name suggests, is the method of growing plants in water, instead of soil. This is part of an entire new generation in farming, and the focus of our new series of articles. We will review different aspects from its history to its part in the future of agriculture. The world has[..]

Harvest Podcast by Growers Network – Sponsored by DryGair

“Harvest” is a new podcast presented by Growers Network. They invited us to collaborate on two special episodes discussing diseases in cannabis cultivation. Listen below. 1. Episode 6: Dehumidification – It’s All About the Dew Point: This episode is about a major factor in botrytis prevention and other bummers to your cannabis crop: the dew point.[..]

6 Tips to Increase Greenhouse Energy Efficiency

Greenhouse agriculture is a big energy consumer, especially when it comes to growing in harsher climates. Heating, lighting and ventilating will always be needed, but there are ways to reduce their footprint and increase energy efficiency. 1. Better Insulation Greenhouse air is constantly modified, meaning energy is poured into it, to keep conditions optimal. So,[..]

Why Air Circulation is Necessary

Whether growing in a greenhouse or indoor, air circulation is necessary to prevent diseases, increase produce quality and get higher yields. Plants are living organisms and just like humans, they like to feel at home. Whether it be warm or cold, dry or humid, every plant has its own optimal conditions. Supplying crops with what[..]

What is the Dew Point – Understanding Greenhouse Humidity

Humidity, and especially the dew point, is a critical factor in cannabis cultivation. One that is much discussed but also often misunderstood. It’s time to set the facts straight. What is humidity? Air is comprised of many different gases, one of which is water vapor- the gaseous form of water. The amount of water vapor[..]

Humidity Woes – Common Greenhouse Humidity Related Problems

High humidity leads to a wide array of humidity related problems. Most important of which, are the infection and development of plant diseases by a variety of fungi and bacteria species. This puts crops at risk of yield loss and low quality production. It also demands higher energy consumption to battle, at a high economic[..]

Blight – Lessons for The Future of Pest Management

Recent outbreaks of late blight spark discussion of crop disease management worldwide. Phytophthora infestans is a microorganism commonly known for causing late blight, a disease notorious for decimating tomato and potato crops. Infamous for causing widespread famine in nineteenth century Britain, late blight is a frightening humidity disease in greenhouses. In most cases, growers use[..]

4 Reasons You Need a Greenhouse Thermal Screen

Have you been using a thermal screen in your greenhouse? You really should… We’re big fans of energy efficiency here at DryGair. We’ve noticed that many greenhouse growers have yet to start using screens. This is a simple list to sum up the reasons we consider thermal, shading and blackout screens to be a must-have.[..]

Greenhouse Diseases – Understanding Plants in the Greenhouse

To create greenhouse disease we need 3 ingredients: a pathogen, a host and the right environment. This is a simple formula, which can have devastating results for a grower. Infamous greenhouse diseases including botrytis (gray mold), powdery mildew, late blight, and downy mildew are known to ruin crops, as well profitability. The plant disease triangle[..]

Innovation in Agriculture

Thomas Robert Malthus said: “The power of population is indefinitely greater than the power in the earth to produce subsistence for man”. According to Malthus’ theory, the human population increasing faster than the food productivity- eventually, humans will suffer from starvation. Malthus lived between the years 1766-1834. It’s more than 200 years later and we[..]

How to Reduce Humidity in the Greenhouse

Growing in a greenhouse presents growers with the complicated challenge of growing under a cover, while controlling the climate inside. This is especially true for reducing humidity in the greenhouse. Plants are constantly performing transpiration, which raises humidity inside the greenhouse. Free water on crops leads to humidity related diseases such as downy mildew, botrytis,[..]

Greenhouse Energy Efficiency

We build greenhouses to control the environment and create optimal growing conditions. But playing “mother nature” can be very expensive. The energy required for the daily operation of a greenhouse includes lighting, to provide additional radiation, heating or cooling to control the temperature and humidity and air circulation to improve climate uniformity. These add up[..]

Botrytis in Cannabis

What is botrytis? Botrytis cinerea, also known as gray mold or bud rot, is the most common humidity related disease in cannabis. It’s a fungal pathogen that affects a variety of crops such as tomatoes, cucumbers, peppers, basil and roses, as well as cannabis. Cannabis is highly sensitive to humidity Growing cannabis in a closed[..]

The Challenges of Growing Cannabis

Why is there so much effort being put into growing cannabis? What are the challenges of growing cannabis for modern purposes? Cannabis, also known as marijuana or hemp, has been part of civilization for centuries. People, in many parts of the world, used the plant to produce fabrics, food, drugs, medicine and perform rituals. The[..]

Dehumidifier for Cannabis

Cannabis is extremely sensitive to humidity. It’s susceptible to a variety of humidity related diseases such as botrytis, downy mildew and alternaria. Treating humidity in the growing space with a dehumidifier for cannabis is the most efficient method to eliminate diseases. It also simultaneously improves grow quality, increases dry weight mass and stimulates the manufacture[..]

The Development of Agriculture in the World

from the agricultural revolution to current days? The main role of the agriculture sector is to produce and provide food. Over the years, the field went through many changes, deriving from cultural and social growth, the development of settlements and transportation, the increase of trade, and the development of technology. In the beginning, human society[..]

Marijuana Cultivation in California

4 years ago, a critical decision was made in the state of California. The decision to cancel the criminal sanctions for using marijuana had a rapid influence, boosting commercial cannabis cultivation. All of those who claimed that the legalization would cause an increase of use among teenagers was wrong. After approving the growing of marijuana[..]

The Carbon Footprint of Indoor Cannabis Cultivation

There are three main methods to growing cannabis these days. While all are viable, they have different limitations and different levels of control over the grow. One big difference is the carbon footprint of the cannabis cultivation. The first, more basic method to grow cannabis, is outdoors. This way, the cannabis grows outside, utilizing the[..]

Marijuana Cultivation in Australia

On March 2016, the Australian government passed a bill which allows the use of marijuana for medicinal purposes. The law permits the sale of medicinal marijuana subject to a doctor’s recommendation. As in many countries around the world, the government of Australia decided to approve a law which allows the use of medical cannabis. The[..]

Cannabis and Humidity

Medical cannabis cultivation is on the rise, but disease outbreaks are leading to reduced quality and large-scale crop loss. These diseases share a common culprit – humidity. The demand for medical cannabis is constantly growing, driving the cannabis industry to expand accordingly; more licenses equal more growers, more yield equals greenhouses instead of private/small facilities.[..]

Growing During the Cold Season

Growers often struggle with greenhouse disease outbreaks during the cold season. But why? Why are diseases more prevelant during cold seasons? To understand why diseases like botrytis appear more often in the winter, it’s important to first understand greenhouse physics. Relative humidity (RH) is the ratio of the amount of water in the air relative[..]