Why Does Soft Water Kill Plants?

Soft water, also known as demineralized water, is water that has undergone a process of removing the minerals, such as calcium and magnesium, that make it hard. While soft water may be great for our skin and hair, it can be detrimental to the growth and health of our plants. But why does soft water kill plants? Here are some possible explanations.

1. Lack of Nutrients

One of the main reasons why soft water can harm plants is due to the lack of essential nutrients that they need to thrive. With the minerals removed, soft water becomes deficient in calcium, magnesium, and other micronutrients that are crucial for plant growth. Without these nutrients, plants may become stunted or unable to produce flowers and fruits.

2. Alkaline pH Level

Another factor that could contribute to the negative effects of soft water on plants is its alkaline pH level. Soft water tends to have a higher pH level, which means it is more alkaline than regular tap water. While some plants may tolerate slightly alkaline soil, most prefer a more acidic or neutral environment. When plants are watered with soft water, the alkaline pH level can change the soil pH and create an unfavorable growing condition for them.

3. Salt Buildup

In addition to the lack of nutrients and high pH level, soft water can also cause salt buildup in the soil over time. Soft water usually contains higher levels of sodium and chloride ions than regular tap water, which can accumulate in the soil and cause toxicity to plants. When salt concentration in the soil becomes too high, it can hinder the ability of plants to absorb water and lead to root damage or death.

4. Stress on Plants

Lastly, soft water can create stress on plants that can make them more susceptible to other problems such as pests and diseases. When plants are exposed to soft water, their cells can become more easily damaged due to the lack of nutrients and high pH level, making them weaker and more vulnerable to external threats.

In conclusion, while soft water may have benefits for our personal use, it is not ideal for watering plants. If you have soft water at home and want to use it to water your plants, consider adding some nutrients to the soil or using a water filter that can add back some of the essential minerals. This will help ensure that your plants receive the nutrients they need to thrive and avoid the negative effects of soft water.