Watering Plants with Hot Water
Fri, Nov 12, 2021

Watering Plants with Hot Water: How to Help the Plant without Harming

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Watering Plants with Hot Water

Many experienced growers claim that watering plants with hot water is an excellent way to improve the well-being of green pets. It would seem that hot water can only harm. But as practice shows, sometimes it is really useful.

How Water Affects Plant Growth

Thanks to water, various nutrients can be transported through the plant. All important trace elements are extracted from the soil and used by the plant. If there is not enough water in the plant cells, then they begin to weaken and cannot even support their weight. But excess water affects plant growth as much as lack of water.

Why Use Hot Water for Plants

Earlier, when pesticides did not yet exist, gardeners practiced a very effective way to control pests and diseases by treating plants with hot water.

Even without the use of ultra-powerful modern insecticides, the yields at that time were plentiful, the plants were less damaged by insects and diseases, and the fruits remained clean, in terms of ecology and health.

Gardeners, as a rule, started spraying plants with hot water with the onset of early spring, even before the buds bloom. At the same time, hibernating eggs of aphids, scale insects, various types of sawflies, as well as pathogenic fungal spores, and harmful bacteria were massively killed as a result of exposure to hot water.

The fact is that harmful insects and various pathogens usually spend the winter in the upper layers of the soil near the root, either hiding in last year’s foliage or finding refuge on plant shoots in the depressions of the bark. With the onset of warmth, they come out of the state of diapause, leave their shelters and begin to actively feed, harming the plants.

But watering plants with boiling water allows you to get rid of most of the pests without using toxic chemicals.

Does Hot Water Make Plants Grow Faster?

Does Hot Water Make Plants Grow Faster

Water temperature is one of the most important factors for most plants, both indoor and outdoor. As practice shows, plants can grow faster and larger when watered with hot water (but at a suitable temperature so as not to harm the plant), compared to cold water. Too hot water can be very dangerous for the plant.

The Best Temperature to Water Plants

If you want to revive the wilted stems, you can use hot water of about 110 ℉. For severely wilted or lignified stems, hot water of about 180-200 ℉ is suitable. If you want to get rid of pests, then use water with a temperature of no more than 120 ℉. But it is recommended to resort to such methods as rarely as possible. For the main watering, use water with a temperature of about 62-72 ℉.

What Temperature Kills Mealybugs

The best water temperature to kill mealybugs is 110 ℉. But make sure the plant can withstand these temperatures.

What Temperature Kills Aphids

To treat plants from aphids, you should give them a “hot shower” with a temperature of about 120 ℉.

Does Hot Water Kill Germs Better than Cold Water?

Some bacteria and parasites can also be killed with too cold water, but this can significantly harm the plant. It is best to use hot water for this matter, but make sure the water is not extremely hot.

Does Hot Water Hurt Plants?

Does Hot Water Hurt Plants

Although watering plants with hot water can be beneficial in some cases, you should not get carried away. If such watering is carried out constantly, the hot water can kill the plant. The fact is that if you use too hot water, the cells of the plant are damaged and can no longer function normally. As a result, the plant may soon die.

Does Hot Water Kill Grass?

Given the fact that hot water can cause significant damage to plants if you do not control the temperature, some are wondering, does boiling water kill grass? Yes, moreover, it is quite an effective way to control unwanted weeds. You can also use hot water to remove weeds between paving stones or cracks in the sidewalk.

Will Boiling Water Hurt Tree Roots?

It is best to water the trees with slightly cooled water, so there would be less chance of harming them. If you water the tree with hot water too often, you run the risk of burning the roots, which can lead to the death of the tree.

Is Boiled Water Good for Plants?

Many growers believe that unboiled water contains a sufficient amount of salts and trace elements, which are necessary for their plants. Thus, watering with “raw” settled water, not only saturates them with moisture but also feeds the plants. And when water is boiled, most of the salts contained in it fall to the bottom in the form of insoluble salt sediment, and the water becomes desalinated and useless for plants. But this is not entirely true.

Is Boiled Water Good for Plants

In nature, the main source of moisture is precipitation, mainly rainfall, which is also not very rich in salt. But this does not affect the growth and vital activity of plants. And all because the substances necessary for plant nutrition are washed out from the soil. But groundwater containing numerous salts, especially calcium salts and to lesser extent magnesium, can be very harmful to plants. We call water containing calcium and magnesium “hard”. It is also the culprit of scale on the walls of teapots. So, this “hard” water is found in water pipes quite often. And it is with such settled water that plants are regularly watered, and their owners do not even suspect that in this way they can harm their green pets.

Many indoor plants, such as gardenia, myrtle, saintpaulia, are very sensitive to water hardness. Constant watering with hard water leads to the fact that the soil quickly becomes saline. The roots of plants on their surface have a thin film – a membrane through which water with nutrients dissolved in it penetrates the plant. Calcium dissolved in “hard” water gradually clogs the pores of the membrane, impairing the process of water exchange. Plants begin to wither and may even die because of this. Therefore, growers always try to soften the water for watering plants, using different methods for this.

Surprisingly, boiling water is one such way. When boiling, calcium and magnesium salts fall to the bottom of the dishes, and the water also undergoes a kind of disinfection, since some pollutants evaporate. And the lack of salts useful for the plant should be replenished not with the help of water, but with the help of special dressings and fertilizers.

Boiling Water Precautions

Great care must be taken when using boiling water for plants.

Firstly, there is no point in rushing and fussing. On the contrary, the gardener should be more careful and vigilant in the process of processing plants.

Secondly, clothes and especially shoes should be comfortable and not restrict movement. When pouring and carrying containers with boiling water, it is advisable to use special potholders made of dense fabric. If necessary, place a container of hot water on the ground in a stable manner to prevent accidental tip-over.

As you can see, there are some advantages to using hot water to water your plants. The main thing is to do it competently and gradually. During the first “hot shower” procedure, the water should be slightly cooler so that the plant does not have a temperature shock. It is better to carry out such procedures at least once a month in summer and spring, and about once every 2 months in the colder season. And in order not to harm the plant for sure, we recommend that you use a thermometer to track the temperature.

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