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Is Filtered Water Good for Watering Plants | Find Out the Best Water for Houseplants

Watching leaf tips on your favorite plants turn brown or on the brink of dying, have you considered which part went wrong? In most cases, the problematic link lies in watering plants wrongly. Among numerous considerations such as water quantity, timing, etc, the water quality weighs the most. There is a wide range of different water for plants. We will compare their advantages and drawbacks and find out the perfect gardening water.



Water for House Plants


Bottled Water

Bottled water is expensive and might be a waste of money to no good purpose. Some bottled water is specially added with mineral materials for the benefits of our human beings. Nevertheless, this is not suitable for plants. Bottled water can cause mineral build-ups on the soil and inhibit the growth of plants. What’s more, some bottled water is simply made from city water and the plant beneficial chemicals have been removed. All in all, bottled water is a terrible choice for plants.


Boiled Water

Some gardeners use boiling water to kill unwanted plants, which is a rather economically friendly method for weeding. For watering, we should use boiled water that has been fully cooled down. The boiling process helps remove almost all dissolved gas including chlorine. However, it could remove minerals that plants desire as well. Also considering the fuel costs, boiled water will not be our first choice when it comes to watering plants.


Well Water

Well water is more likely to contain excessive amounts of calcium, magnesium, iron, lead, nitrogen, or other chemical contaminants. The deeper your well is, the more likely it is exposed to the underground limestone and contains a higher level of calcium. Water with highly concentrated calcium is often called “hard water”, which is extremely harmful to plants such as azaleas and blueberries. If you live near an agricultural or industrial area, fertilizers and pesticides will have larger chances to contaminate your nearby underground water. For places near dumping grounds, their underground water is often found with heavy metals. Before you decide to use well water, it is better to test the pH of water first.


Distilled Water

Distilled water comes from boiling water.  Compounds like salt and minerals cannot join the water into the evaporation, and as a result of, distilled water is 100% pure water. But there is still a problem—essential minerals which plants need have been removed too. The cost to make or buy distilled water can make it the last choice for most family.



If you have used rainwater as a long-term source for houseplants, it is a smart choice. Rainwater is a great option you can count on. Plants are in desire of nitrogen, a must-have chemical to help them produce green photosynthetic pigment chlorophyll, which keeps them green. Lacking the element for a long time, they may turn yellow or even lose vitality. Plants mainly rely on two ways to gain the element: one is from fertiliser and the other is from rainwater, which releases compounds that can react with the bacteria and fungi in the soil to bring about nitrogen. However, rain does not fall every day, especially in inland areas.


River Water

For the economical purpose, river water is a choice not to miss. However, it is better to do a little research about its upstream whether there are farms, chemical plants or waste treatment facilities, all of which could release wastes into the runoff. The pesticides from lawns and other unknown contaminants can have an impact on water quality as well. As the Water Quality for Crop Production, a report from the University of Massachusetts Amherst says, “Reclaimed water, runoff water, or recycled water may require reconditioning before use for irrigation since disease organisms, soluble salts and traces of organic chemicals may be present”, we believe a thorough observation is highly recommended on the water resources if you are planning to use the river water to irrigate or water plants.


Tap Water

Out of purification purpose, tap water usually contains a small amount of calcium, magnesium, salts, minerals, pharmaceuticals and treatment chemicals such as chlorine and fluorine which could pose a threat to plants, especially to sensitive plants such as spiders, corn, and palms, according to Washington State University. Accumulated calcium and magnesium can build up on the soil surface, which can inhibit plants’ growth, cause leaves to wilt or even lead to dead roots. Tap water rich in nitrates because of fertilizer run-off will also contribute to excess nitrogen, creating an imbalance in nutrients. The amount of these contaminants in tap water differs in different areas because water comes from different sources, and the purification process might not be the same.


Filtered Water

Though municipal tap water is considered filtered, filtered water by household filtration systems such as refrigerator filters, under sink water filters and faucet water filters proves cleaner and healthier. Unlike bottled water, boiled water, natural water sources such as river water and well water, filtered water is more controllable in quality depending on what filters you choose to use. An effective filter can remove chlorine, soften water, and yet retain beneficial minerals, offering the best water not only for humankind but also what most plants want.


The Best Water for Houseplants


During the comparison, we concluded that filtered water is the best choice for our houseplants in terms of its performance, convenience as well as cost; its filters only need to be replaced every six months. It is the easiest way to get healthy water for both our plants and our family.



Recommendations for Caring Your Plants


  1. Ensure drainage holes on pots to prevent waterlogging
  2. Water most plants every 2–4 days in spring and summer
  3. Don’t water desert cacti and succulents too much
  4. Water less in autumn and winter when plants are slower in growth
  5. Prevent overly soggy compost
  6. Avoid getting water on the leaves and stems of plants with soft, fuzzy foliage, or succulents and cacti.


Best Water Filter for Plants



To find reliable water filters, you can count on Clatterans, a dedicated water filter online supplier. It provides a wide variety of refrigerator replacement options for name brands like Maytag, Whirlpool, GE, Frigidaire, Amana, KitchenAid, Kenmore, Jenn-Air, or LG and other different types of water filtration systems. Whether you need indoor filtration systems or outdoor filtration solutions, Clatterans has high-quality and NSF certified products to provide.


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