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How to Increase Humidity for Indoor Plants

Maintaining the right humidity levels is crucial for the health and growth of your indoor plants. Many houseplants, especially tropical varieties, thrive in environments with higher humidity. If your home or the grow space is too dry, your plants may suffer from issues like dry leaves, brown tips, and stunted growth. Fortunately, there are several effective ways to increase humidity for your plants and create a more suitable environment for them to flourish.

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Using a Plant Humidifier

One of the most efficient and straightforward ways to increase humidity for plants is by using a plant humidifier. These devices are specifically designed to add moisture to the air, creating a more humid environment. Here are a few reasons why a plant humidifier is an excellent choice:

  • Consistent Humidity Levels: Unlike other methods, a humidifier can maintain a steady humidity level, which is crucial for sensitive plants.
  • Ease of Use: Simply fill the humidifier with water, set it to your desired humidity level, and let it work its magic.
  • Coverage: Humidifiers can cover a large area, making them ideal for plant collections or large indoor gardens.
  • Health Benefits: Besides benefiting your plants, a humidifier can improve indoor air quality, benefiting your own health as well.

If you are flooded by the multiple choices in the market and don’t know how to choose, below are some factors to consider when selecting an indoor humidifier for plants: 

  • Large Capacity: Look for a humidifier with a large tank capacity, such as a 6-liter tank, which provides all-day humidification for up to 24 hours without frequent refills. This ensures your plants receive consistent moisture. For even more water capacity and making the most of your garden, consider options like the 16L version.
  • Top Fill Water Design: A wide opening design makes refilling easy and mess-free, adding convenience to your plant care routine.
  • Temperature & Humidity Probe: This feature allows you to monitor and maintain the optimal environment for your plants, ensuring they thrive.
  • Adjustable Mist Levels: Choose a humidifier with multiple mist levels, such as a maximum output of 450ml/h, to adjust the humidity according to the specific needs of different plants.
  • Timer Setting: A timer feature, which can be set between 1 to 12 hours, allows the humidifier to operate according to your plants’ requirements, even when you’re not home.
  • Customizable Humidity: The ability to set humidity levels between 35% and 95% helps maintain a stable environment tailored to your plants’ needs.

Grouping Plants Together

Plants naturally release moisture through a process called transpiration. By grouping several plants together, you can create a microenvironment where the humidity is higher due to the collective transpiration of the plants. This method works particularly well for small spaces or plant shelves.

Pebble Trays

Another simple method to increase humidity for your plants is to use pebble trays. Fill a shallow tray with pebbles and add water until the pebbles are just covered. Place your plant pots on top of the pebbles. As the water evaporates, it increases the humidity around the plants. Ensure the pots are not sitting directly in the water to avoid root rot.


Regularly misting your plants with water can temporarily increase humidity. Use a spray bottle to lightly mist the leaves of your plants once or twice a day. While this method is easy and inexpensive, it only provides a short-term increase in humidity and may need to be combined with other methods for best results.

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Creating a Humidity Tent

For smaller plants or seedlings, you can create a humidity tent by placing a clear plastic bag or a dome over the plant. Make sure to leave some openings for air circulation to prevent mold and mildew.

Bathrooms and Kitchens

These areas of your home naturally have higher humidity due to the use of water. Placing plants in these rooms can help them thrive. Just ensure they receive enough light and are not exposed to harsh temperature fluctuations.

FAQs about Increasing Humidity for Indoor Plants

What is the ideal humidity level for most houseplants?

Most houseplants thrive in humidity levels between 40% and 60%. This range mimics the natural tropical environments many houseplants originate from. Maintaining this humidity level helps prevent issues like browning leaf tips and encourages healthy growth.

How often should I refill my plant humidifier?

The frequency of refilling your plant humidifier depends on the size of the humidifier and the humidity level you set. In general, it’s a good practice to check the water level daily. Smaller humidifiers may need to be refilled every day or every couple of days, while larger ones might last several days before needing a refill. Monitoring the humidity levels with a hygrometer can help you adjust the settings and refilling schedule accordingly.

Can I use a regular room humidifier for my plants?

Yes, a regular room humidifier can effectively increase humidity for your plants, especially in larger spaces. Ensure the humidifier is placed near your plants but not too close to avoid water droplets directly landing on the foliage, which can lead to fungal issues. Additionally, maintaining proper room ventilation helps distribute the moisture evenly.

Are there any plants that don’t need increased humidity?

Yes, some plants, such as succulents and cacti, prefer dry conditions and generally do not need increased humidity. These plants are adapted to arid environments and can thrive in lower humidity levels typically found in most homes. Over-humidifying these plants can lead to problems like root rot and fungal infections.


Increasing humidity for your indoor plants is essential for their health and growth. While there are many methods to achieve this, using a plant humidifier stands out as an effective and convenient solution. If you are not a fan of machines, by incorporating one or more of these techniques mentioned above, you can create a more humid environment that will help your plants thrive and flourish, and therefore take your garden to the next level

Lyne Proulx
Lyne Proulxhttps://ottawamommyclub.ca/
Lyne Proulx is a Certified WEBB Bodywork Pet Practitioner, Certified Infant Massage Instructor (CIMI), Certified Professional Wedding Consultant, and an Event Planner. She loves all things Disney and is an avid teaholic and chocoholic. She coordinated the Annual Infant Information Day/Early Years Expo for the City of Ottawa for 8 years. She was the Queen B of the BConnected Conference, Canada's Digital Influencer and social media Conference in Ottawa and Toronto. She was also the co-chair of the Navan for Kraft Hockeyville 2009-2011 committee that organized five community events within 6 months, and helped Navan reach the top 10 finalists in Canada. In April 2011, she received the City of Ottawa Mayor's City Builder Award.

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