Is it Ok to Water Plants with Softened Water?

Soft water is water that has been processed to remove minerals that make it hard. While soft water may be more appealing to humans, it may not always be suitable for watering plants. This raises the question, is it ok to water plants with softened water?

The Effect on Plant Growth

The minerals found in hard water, including calcium and magnesium, are essential nutrients for plant growth. When they are missing, plants may experience stunted growth, yellowing of leaves or even plant death. Soft water tends to lack these minerals, which can be detrimental to plant health. However, the effect on plant growth can vary depending on the plant species and the level of softening.

The Impact on Soil pH

Using soft water to water plants can also affect the soil pH. Soft water has a lower pH level compared to hard water, which can lead to the acidification of soil over time. Most plants thrive in a slightly acidic soil, and too much acidification can make it difficult for plants to access important nutrients. It is therefore important to monitor the pH level of the soil and provide the necessary nutrients to ensure the plants are healthy.

The Effect on Soil Structure

Soft water can also impact the soil structure. It may contain sodium, which can lead to soil compaction and subsequent drainage problems. This is because sodium particles can cause clay particles to clump together, leading to soil particles becoming more tightly packed. This makes it difficult for water and air to penetrate the soil, which can result in waterlogging and ultimately, root rot.

The Alternative to Softened Water

If you're concerned about using softened water to water your plants, there are alternative options to consider. Rainwater is an excellent choice, as it contains natural minerals and is free of harmful chemicals. You can also use tap water to water your plants, but it's important to check the quality of your water supply first. If it's hard water, consider using a filter or boiling the water first to remove the minerals.

The Bottom Line

While soft water may be more appealing to humans, it's not always the best choice for watering plants. The lack of essential minerals can lead to a range of problems in plant growth, soil pH and soil structure. To ensure the optimal health of your plants, consider using rainwater or tap water that has been properly filtered or treated before use.