Carbonic acid is useful

Can you water plants with mineral water?

People love mineral water, whether sparkling or not. But plants can also enjoy mineral water. They are not primarily concerned with quenching their thirst. The elements dissolved in the water are much more in demand. However, not all water is created equal, and every plant has its preferences. When and in what dose can we pour mineral water into the flower pot?


Range of minerals

Plants need various minerals, among other things, in order to develop naturally. They get these with their roots from the earth in which they grow. So over time the earth is more and more depleted. The need for new minerals increases and is usually satisfied with regular fertilizers. But the mineral water also contains minerals that are useful for the plants. First of all, these are:

Note: The minerals are already dissolved in the water and are therefore quickly and easily available. They can be absorbed by the roots of the plant immediately after watering.

Function as a thirst quencher

Of course, not only the minerals are used. The liquid itself also serves to quench the plant's thirst for water. This type of water can therefore be used as a supplement to tap water and rainwater. The dissolved minerals make mineral water harder than rainwater. However, compared to tap water in many areas of the country, it is still softer. Also, not every plant owner has soft rainwater available for his indoor plants.

Still or carbonated water?

Both waters have the same amount of minerals, even if their concentration varies from variety to variety. The dissolved CO2 makes the decisive difference. It tingles the tongue so nicely and refreshes, at least most people. We know from plants that they don't mind the gas in the water. After all, they themselves consume CO2 during photosynthesis. Both still and carbonated water are therefore suitable for watering the plants. Of course, stale water too, from which most of the CO2 has already escaped.

What plants to water

All plants need minerals, so everyone can benefit from the bottled water they buy. Every plant tolerates a small dose every now and then. Especially those who don't like lime too much. Unfortunately, tap water contains too much of this in many places. In addition, each plant will quickly indicate whether you can get watering with mineral water. If it is thriving and making a vital impression, stick with it. Otherwise you should use a different irrigation water and a more suitable fertilizer.

Tip: For plants that require very poor soil, mineral water should be avoided entirely or only occasionally watered with it. For example with cacti and succulents.

How often to water

In theory, a plant can only be watered with mineral water. The question of how often then depends on how often a plant species needs watering. The dose of the minerals dissolved in the water is usually so low that over-fertilization is not to be feared. Only water types with a high conductance, i.e. H. high nutrient concentration, should be used sparingly. They can increase the concentration of salt in the soil, which can cause burns to the roots. They also have a high degree of hardness and are therefore not suitable in the long term for plants such as azaleas, which prefer soft water.

Tip: Regular repotting of indoor plants combined with changing the soil prevents the salt concentration in the soil from increasing excessively.

Collect water

Anyone who regularly empties mineral water bottles by simply pouring leftovers into the pot of a plant can do a lot wrong. He risks irrigation that does not meet his needs. Most plants like it when the soil dries up before they get water again. Wet roots are often acknowledged with rot. It makes no difference whether it is the finest and most expensive water that the market currently has to offer. Leave half-empty water bottles until it is time for the water supply. You can also collect the mineral water residues in a watering can in the meantime.

Mineral water as a fertilizer substitute?

This type of fertilization may not be sufficient for plants with high mineral requirements. For other plants, too, it becomes scarce if they are only sporadically watered with mineral-rich water. Find out beforehand what the plant needs so that there are no deficiency symptoms. You can also rely on your own observations in this regard.

Cost factor

The water from the bottle can be described as expensive compared to tap water. Especially in view of the fact that plants regularly require water supplies. If they are poured exclusively with mineral water, the "price-performance ratio" is no longer correct.

Watering with mineral water is therefore advisable in selected cases:

  • no other water is available
  • sensible use of stale water residues
  • Watering plant species that will benefit greatly from it
Tip: If the amounts of water available are too small to supply all plants, you can also use coffee and tea as fertilizers.

Care of orchids

Finally, a personal experience of the author of this text. It should not be explained as generally valid, but the results are convincing and are worth copying. The orchids are watered by her exclusively with leftover mineral water and bloom for years with almost no interruption. The orchids do not receive any further fertilizer or other irrigation water.

  • Thoroughly water the orchid substrate
  • with fresh or stale mineral water
  • Pour away excess water after an hour
  • Do not water again until the substrate is dry
  • when the pot is very light to lift

Of course, the mineral-rich carbonated water is not a magic remedy that can compensate for unfavorable living conditions. Therefore, make sure that all the needs of a plant are met as optimally as possible.