Is It Okay to Use Softened Water to Water Plants?

Softened water is a type of water that has gone through a process of removing hard minerals like calcium and magnesium. This process, which involves the use of water softeners, is beneficial to households as it prevents the buildup of limescale on faucets, pipes, and appliances. However, when it comes to watering plants, the question remains: is it okay to use softened water?

The Pros and Cons of Using Softened Water to Water Plants

While softened water is safe for humans to drink and use for other household purposes, it can have both advantages and disadvantages when used on plants. One of the main benefits of using softened water is that it contains fewer minerals that may clog the tiny openings, or stomata, on the surface of the leaves. When these stomata are blocked, plants cannot properly carry out photosynthesis, which may lead to stunted growth.

On the other hand, softened water is high in sodium content, which can be harmful to plants. Excessive amounts of sodium in the soil can cause a decrease in water uptake, which, in turn, can lead to dehydration and possible plant death. Additionally, softened water can alter the pH level of the soil, which can negatively impact the plant's nutrient uptake and growth.

How to Safely Use Softened Water on Plants

If you're considering using softened water on your plants, there are several ways to minimize the potential negative effects. One option is to use the softened water in combination with rainwater or tap water to reduce its sodium content. Simply collect rainwater or tap water and add it to the softened water in a ratio of 1:1 or 2:1, depending on the plant's tolerance level.

Another option is to apply gypsum or calcium to the soil to counteract the effects of high sodium levels. Gypsum works by replacing sodium with calcium ions, which can improve the soil structure and help plants grow healthier. Similarly, applying calcium can reduce the effects of sodium and improve the soil's nutrient content.

The Bottom Line

While softened water can be used to water plants, it's essential to keep in mind the possible negative effects that it may have. To ensure the optimal health and growth of your plants, it's recommended to use rainwater or tap water as much as possible. However, if you must use softened water, make sure to follow the proper steps to reduce its sodium content and neutralize the soil's pH level. By doing so, you can help your plants thrive and grow healthy and strong.