Should I Put A Bowl Of Water In My Greenhouse?

Imagine stepping into your greenhouse, surrounded by lush green plants and the gentle hum of nature. As you tend to your beloved plants, a thought crosses your mind: should you put a bowl of water in your greenhouse? You’ve heard of people doing this, but is it really necessary? In this article, we will explore the benefits and considerations of placing a bowl of water in your greenhouse, helping you make an informed decision for the well-being of your plants.

Benefits of having water in a greenhouse

Managing humidity levels

When it comes to creating an ideal growing environment for your plants, humidity plays a crucial role. Having water in your greenhouse can help in managing humidity levels effectively. By placing a bowl of water inside your greenhouse, you can increase or decrease the moisture content in the air, depending on the needs of your plants.

Creating a microclimate

Water in a greenhouse can also aid in creating a microclimate. By strategically placing a bowl of water, you can influence the temperature and humidity in a specific area of your greenhouse. This allows you to create different growing conditions for plants that have varying requirements, providing them with the best possible growing environment.

Preventing dehydration

Plants need water to survive, and lack of it can lead to dehydration which can have detrimental effects on their growth and overall health. Having a bowl of water in your greenhouse ensures a constant supply of moisture. This way, your plants have access to the water they need, reducing the risk of dehydration and promoting optimal growth.

Considerations before placing a bowl of water

Greenhouse size and layout

Before placing a bowl of water in your greenhouse, consider the size and layout of your greenhouse. The water source should be placed in a location that maximizes its benefits while taking into account the available space. It’s important to ensure that the bowl doesn’t obstruct the movement of plants or impede your ability to tend to them.

Water source and quality

When considering placing a bowl of water in your greenhouse, it’s crucial to choose the right water source and ensure its quality. Using clean, filtered water is recommended to minimize the risk of impurities and contaminants that could harm your plants. Additionally, certain water sources, such as rainwater or distilled water, may be better suited for specific plant species or more sensitive plants.

Potential risks and drawbacks

While having water in your greenhouse can offer numerous benefits, it’s important to be aware of potential risks and drawbacks. One potential risk is the increased likelihood of fungal diseases. Standing water can create a breeding ground for fungi, which can harm your plants. Additionally, having a bowl of water may attract pests and insects that could damage your plants or disrupt the delicate ecosystem of your greenhouse. Lastly, maintaining the cleanliness of the water and the bowl requires regular attention and effort.

Managing humidity levels with a bowl of water

Increasing humidity during dry periods

During dry periods or in areas with low humidity, maintaining the right moisture levels in your greenhouse can be a challenge. Placing a bowl of water inside can help increase the humidity by allowing the water to evaporate slowly into the air. This provides a more suitable environment for plants that thrive in humid conditions.

Preventing excessive humidity during humid periods

On the other hand, if you’re in an area with high humidity levels, a bowl of water can help prevent excessive humidity. When the air is saturated with moisture, the water in the bowl can absorb some of the excess humidity, preventing your plants from becoming overexposed to moisture. This can be especially beneficial for plants that prefer drier conditions or are susceptible to fungal diseases.

Impact on plant growth and health

Maintaining optimal humidity levels is crucial for supporting plant growth and health. Having water in your greenhouse can contribute to this by providing a consistent source of moisture in the air. By properly managing humidity, you can promote healthy plant growth, reduce the risk of stress or wilting, and even help prevent certain diseases that thrive in dry or overly humid environments.

Creating a microclimate in the greenhouse

Controlling temperature fluctuations

One of the key advantages of having water in your greenhouse is the ability to create a microclimate. By strategically placing a bowl of water, you can help control temperature fluctuations within your greenhouse. The water will act as a heat sink, absorbing excess heat during the day and gradually releasing it at night, resulting in a more stable and temperature-regulated environment for your plants.

Providing a more stable environment

Plants are sensitive to sudden changes in temperature and can suffer from stress or damage as a result. By having water in your greenhouse, you can mitigate temperature fluctuations and create a more stable environment for your plants. This stability promotes better plant growth and can increase overall plant resilience.

Enhancing plant adaptation

Different plants have varying temperature and humidity preferences. By creating a microclimate within your greenhouse, you can cater to the specific needs of different plant species. This can enhance their adaptation and provide them with a more suitable environment that encourages healthy growth and development.

Preventing dehydration in plants

Reducing water stress

Water stress can occur when plants do not receive adequate moisture, leading to stunted growth, leaf wilting, and even plant death. Having a bowl of water in your greenhouse helps prevent dehydration by providing a constant source of moisture. This reduces the risk of water stress and allows your plants to thrive.

Promoting optimal growth

When plants have access to sufficient water, they can fully develop and grow to their potential. By having water in your greenhouse, you create an environment that promotes optimal growth. This includes healthy foliage, robust root systems, and increased overall plant vigor.

Protecting sensitive plants

Some plants are more sensitive to dry conditions than others. Placing a bowl of water in your greenhouse can offer protection to these sensitive plants, ensuring they receive the proper moisture they require. This is especially important for delicate plants or those that have specific humidity requirements to thrive.

Greenhouse size and layout considerations

Available space for a water source

Before placing a bowl of water in your greenhouse, consider the available space for a water source. While the bowl itself may not take up too much space, you need to ensure there is enough room for easy access and maintenance. The placement of the bowl should also allow for proper airflow and distribution of humidity throughout your greenhouse.

Placement of the bowl for maximum benefit

To maximize the benefits of having water in your greenhouse, it’s important to strategically place the bowl. Consider the layout of your greenhouse and the areas where plants may benefit the most from increased humidity or temperature regulation. Placing the bowl near plants that require higher humidity levels or in areas prone to temperature fluctuations can help create a more favorable microclimate for those plants.

Ensuring water accessibility for plants

While the bowl of water in your greenhouse is primarily meant to provide humidity and regulate temperature, it’s essential to ensure that it doesn’t inhibit water accessibility for your plants. Make sure that the placement of the bowl doesn’t obstruct the watering process or compromise the ability of your plants to receive sufficient water directly to their roots.

Water source and quality

Choosing the right water

When considering a bowl of water in your greenhouse, it’s important to choose the right water source. Tap water is typically suitable for most plants, but depending on your location, it may contain certain chemicals or minerals that could affect plant health. If possible, use filtered water or, if suitable, collect rainwater to ensure a clean and pure water source for your plants.

Minimizing impurities and contaminants

Impurities and contaminants in water can negatively impact plant health. When using a bowl of water in your greenhouse, take steps to minimize impurities and contaminants. Regularly clean the bowl to remove any dirt, debris, or algae buildup. If you notice any signs of contamination or discoloration in the water, replace it immediately to avoid harming your plants.

Avoiding water-related diseases in plants

Waterborne diseases can pose a threat to your plants’ health. To avoid introducing or spreading diseases in your greenhouse, it’s crucial to ensure the water you use is free from pathogens and other harmful microorganisms. Maintain good hygiene practices by keeping the bowl clean and removing any dead or decaying plant matter that may contaminate the water.

Potential risks and drawbacks

Increased risk of fungal diseases

Although having water in your greenhouse can create beneficial humidity, it can also increase the risk of fungal diseases. Standing water provides an ideal breeding ground for fungi, which can infect and damage your plants. To mitigate this risk, monitor the condition of the water and the surrounding environment closely. Ensure proper ventilation and avoid overwatering your plants to minimize the likelihood of fungal infestations.

Attracting pests and insects

Having a bowl of water in your greenhouse can attract pests and insects. Some insects, such as mosquitoes or fungus gnats, lay their eggs in standing water. This can lead to an infestation and cause harm to your plants. To prevent this, regularly inspect the water for any signs of pests or eggs and promptly remove them. Additionally, implement pest control measures and maintain good overall greenhouse hygiene.

Maintenance and cleanliness

A bowl of water in your greenhouse requires regular maintenance and cleanliness. You must clean the bowl frequently to prevent the buildup of algae, dirt, or other contaminants. Regularly replace the water, especially if it becomes visibly dirty or starts to smell unpleasant. Keeping the water and the surrounding area clean is vital to avoid any negative effects on the health and growth of your plants.

Alternative methods to increase humidity

Using misting systems

Misting systems are an effective way to increase humidity in a greenhouse. These systems spray a fine mist of water into the air, creating a humid environment. Misting systems are especially useful for larger greenhouses where a single bowl may not provide enough humidity throughout the entire space. However, it’s important to monitor the humidity levels closely to ensure they remain within the optimal range for your plants.

Placing trays of water near plants

Another alternative method to increase humidity is by placing trays of water near your plants. These trays, filled with water, allow for the gradual evaporation of moisture into the air, increasing the humidity levels around your plants. This method is particularly useful for smaller greenhouses or specific areas that require targeted humidity adjustments.

Using humidifiers or evaporative coolers

Humidifiers and evaporative coolers are more advanced options for maintaining humidity levels in a greenhouse. Humidifiers release a fine mist of water vapor into the air, while evaporative coolers actively cool and humidify the surrounding environment. These systems are particularly beneficial in regions with extremely dry or hot climates, where humidity management is a significant challenge.


When considering whether to place a bowl of water in your greenhouse, it’s important to assess the specific needs of your plants and consider the advantages and disadvantages. Having water in your greenhouse offers various benefits such as managing humidity levels, creating a microclimate, and preventing dehydration. However, factors such as greenhouse size and layout, water source and quality, and potential risks and drawbacks need to be carefully considered.

By understanding the impact of water in your greenhouse, you can optimize humidity management, promote healthy plant growth, and create an environment that supports your plants’ specific needs. Whether you choose to use a bowl of water, alternative methods like misting systems or trays, or more sophisticated solutions like humidifiers or evaporative coolers, ensure that you prioritize the well-being of your plants and maintain a carefully balanced moisture level in your greenhouse.

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About the Author: Jake Scott