Purified water is good for plants

Irrigation water: Use of rainwater for gardens and plants

Rainwater is the best irrigation water for plants, both in the garden and in the house. In contrast to tap water, it is free of lime and free of charge. In contrast, tap water can contain germicidal additives that harm the plants. That is why most gardeners have a rain barrel or cistern in their garden in which they can collect and store the water falling from the sky.

If you don't have a water collection container in your garden, but still think about the well-being of your plants, you can find out about the various options and models in Edinger's rainwater shop. The various options include underground tanks that are invisibly buried in the ground, but also classic rain barrels with a direct inlet from the rain gutter.

But back to the lime in the water. It is not fundamentally harmful to plants. Even if they are only supplied with water by rain in nature, many of them tolerate the additional minerals quite well. As for humans, minerals are vital for plants. Excess lime, however, is actually somewhat harmful and causes poor nutrient exemption in sensitive plants. That is why plant lovers rely on low-calcium rainwater for healthy plants in the garden and on the windowsill. For example, bromeliads are poured with soft water. The bromeliads tolerate rainwater particularly well.

If you don't have a garden and therefore no rain barrel, you can use a few tricks to reduce the lime content in tap water. However, letting it stand and boil does not help much. When left to stand, only volatile compounds disappear, including chlorine, which is harmful to plants. When boiling, the lime content does not change, only the carbon hardness is reduced.

On the other hand, it is more effective to soften the tap water with a third of distilled water. Rainwater is basically nothing more than natural distilled water. Some people also mix a dash of vinegar in the tap water to reduce the base content. However, this method is not entirely undisputed among plant enthusiasts.

Rainwater is and remains the most "digestible" irrigation water because it is the most natural and compatible form. Some plants do not tolerate hard water. Epiphytic growing plants should only be watered with rainwater. Epiphytes grow in forks of branches and on the branches of large trees. There they absorb the required moisture exclusively from the rainwater. Since such plants have adapted to this during evolution, they only tolerate calcareous water very poorly. The best irrigation water for epiphytic orchids and ferns is clean rainwater. However, you do not have to worry about serious damage when watering with calcareous tap water. In the end, the only disturbing but harmless thing is the lime layer, which slowly settles on the surface of the potting soil over time.