Can I Use Dehumidifier Water For Plants?

by Véronique Raymond

Dehumidifiers are designed to remove excess humidity from our homes, so they don’t stagnate and collect water.

The good news is that the dehumidifier’s condensed water can be used again in your house.

But what about plants? Is this distilled water for your indoor plants safe for them or not?

Dehumidifier water can be used for plants, but it must be filtered before being used to prevent contaminating the soil. Plants grown in poorly ventilated areas tend to become stressed due to too much moisture and grow poorly. If you have a dehumidifier, use it to dry your plant room instead of watering your plants with the water from your dehumidifier.

The water collected from the dehumidifier can be used to water plants that you will be eating, but not those with leaves.

The contaminants in this type of water include bacteria and other microorganisms, as well as trace metal ions which may have negative health effects on your plant’s growth.

You can use the dehumidifier water to water some plants that do not care about the type of water you are using.

The main reason why this isn’t safe is that it contains mold, dust, and other contaminants. You can avoid these issues by collecting clean rainwater or spring runoff instead!


What Makes Dehumidifier Water Not Good for Plants

If you own a dehumidifier, the chances are that it can produce water inside of its tank.

It would be best if you emptied the residue tank on a regular basis or even daily, depending on how much moisture is present in your environment. Some models come with pumps to help pump this water outdoors as well.

What can you do with the water that’s left behind in your dehumidifier?

There are a lot of practical ideas, such as using it to water plants or reducing your carbon footprint. One idea that comes to most people who own a dehumidifier is for them to generate enough condensate so they can use it themselves and have time to save money on their monthly bills too.

If you want to use the water in your garden, you should know that it might not be safe for some plants. But why is this so? Let me explain–condensate water is distilled and boiled, which makes it less toxic than unfiltered tap or well water.

How does a dehumidifier work?

The dehumidifier removes water vapor from the air and turns moisture into liquid. This can be problematic for plants because, when there is a lot of humidity in the room, a plant will absorb this water which doesn’t really harm it but does damage some other surfaces.

Most dehumidifiers reduce humidity through condensation of the excess moisture. The motor inside rotates a fan that pulls from the room filters out dust and other small particles before exposing it to freezing coils to condense the water out.

The water formed when the compressor condensates are called “condensate.” It’s collected in a tank or bucket, and you’re required to empty it periodically.  But where is this going?

Some models come with a pipe that extends away from the unit and helps drain water outdoors. Most units have a pump to help force the water out, but sometimes it isn’t enough, so you may need an external hose or other means of draining it for good. You can decide whether to allow this wastewater to drip down your drainpipe or use it in some way, like watering plants.


Plants You Can Damp With Dehumidifier Condensate

The problem is that the water is contaminated. It cannot be used to irrigate edible plants because it has so many contaminants in it. However, the dehumidifier condensate can still be used for other things and isn’t as contaminated as water itself!

In contrast, if you can’t consume it because of its purity level, there is no need to take special care when using it.

You can use the condensate to water-thirsty inedible plants that won’t end up on your plate. These include garden flowers, shrubs, trees, and more.

The demineralized nature of the dehumidifier water makes it ideal for carnivorous plants, which thrive in such conditions. The condensate is deprived of minerals essential for plant development as compared to tap or distilled water that may contain contaminants. This difference between contaminated and purified waters makes it similar to this dehumidifier’s own liquid: distilled water beside the contaminants contained in a regular sample.

The fact that it doesn’t need normal water is perfect for a plant such as carnivorous, dracaenas, and spider plants.

humidifier during work

 Is Dehumidifier Water the Same as Distilled Water?

 The simple answer to this question is: no. As Marken explained, distilled water can be very pure. The water that comes out of a dehumidifier (which usually has excess moisture) would be more contaminated with things floating in the air or growing in it like molds and bacteria.

Distilled water is boiled, evaporated, and condensed. This approach strips the standard minerals attending in tap water like calcium and magnesium, as well as other inorganic compounds. While distilled water is perfectly safe to drink, it’s these minerals that give our drinking water its distinctive taste.

However, according to the WHO, there are some negative impacts that come with drinking distilled water:

  • Distilled water can be just as bad for you as tap/spring water, a possible cause of rickets.
  • The mineral content of distilled and bottled waters may not always match what is stated on the label.

Some researchers from the University of Illinois Urbana-Champaign recommend drinking tap water because it has natural minerals in it, which help you replenish any lost minerals during your day.


Other Uses

Dehumidifiers and air conditioner water are not only for gardening. There are many other ways to make use of it! You can flush your toilet with the water, wash cars and windows, fill your iron up with the moisture you’ve soaked out of them while they’re drying, or add more moisture to whatever else you want – dehumidifier and air conditioner water are versatile products that will be used across various industries in different scenarios such as washing machines or even detergents themselves.



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