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Rainwater harvesting for garden – Why do plants love rain?

Rainwater harvesting for garden – Why do plants love rain?

If you have ever wondered why most plants love rainwater, then this blog is really for you. This blog will throw light on, “The advantages of rainwater harvesting as a medium of water for plants.

In the past centuries, Rainwater harvesting has made our lives easier with almost everything. We are indeed born in a world where nature plays a vital role. And when it comes to getting water for your plants, rainwater seems as natural as you can get.

So, all of you who are looking forward to a healthy & lush green garden by using rainwater, then don’t look further. This blog explains it all.

So, Let’s learn in detail about it : 

Understanding about Rainwater Harvesting

Rainwater Harvesting
Rainwater Harvesting

Rainwater harvesting is a sustainable system that involves collecting, storing, and managing the collected rainwater for our use. 

We have to value rainwater. They are not only beneficial for our gardens but also for the holistic and natural advantages that they provide us.

In an increasingly growing world where there is a lack of water security, rainwater harvesting can solve the problem. As rainwater harvesting can help provide sustainable supplies for communities and homes.

 With that in mind, it is high time to realize the benefits of rainwater harvesting and putting your Green thumb into work!

Also, Read l Rainwater Harvesting – The need of the hour

Different Methods for Rainwater harvesting

There is numerous way to harvest rainwater. Here, I’ve highlighted the best possible ways for Rainwater Harvesting. All these need a lot of caution and knowledge. So please be sure to have a good idea before you start to collect the Rainwater.

Rainwater Harvesting System

So, Let’s dive into the different methods to save rainwater :


  • It is a kind of storage unit for the water harvesting system. 
  • It is used to store water and release it to the distribution system as per the need.
  • The Water falling on the catchment area is stored for later use.

2.Conveyance System

  • It is a part of a drainage system that is used to transport the water from one area to another.
  • The transportation of rainwater is done without any detention of water
  • The entire network of pipes, guttering, and downspouts are used to deliver the captured rainwater to the containers for storage.

3.First flush

  • It is a device used to carry the dirt from your roofs and divert it from the storage tank.
  • It helps to clean water that will enter your reservoir tank after every raindrop passes through the first flush.
  • By using the first flush, we can use the clean rainwater useful for a long time


  • It is use for removing unwanted materail from rainwater to keep fresh.
  • Filters collect moss, leaves, bird feces, etc. all the while rainwater is coming in contact with them.
  • Hence, When rainwater falls on a roof, it is filter to consume it.

5.Tanks and recharge system 

  • Tanks and recharge structures are the most common ones to harvest rainwater.
  • Perfectly choose the setup you want to use to store the water.
  • The water can be stored in tanks or recharge structures depending on your preference and budget.

 Water harvesting is not just about conserving surface water. It has innumerable applications in areas where rainfalls. However, the land area is not sufficient to store them all for easy access. In such a case, you will need a good recharge system to store the water over the year.

Also, if you don’t have such a big rainwater harvesting system, then no need to worry. You can simply fill a bucket of water and used it to water your plants. And watch them thrive greener and healthier beautifully.

Plants love the rainy season – It’s just their natural way to enjoy under the sky where water is falling in their beautiful petals

Arpita Pujari

Rainwater Harvesting

Rainwater Harvesting
Plants love rain too

Let’s understand the main reasons behind the love for rains of plants :

1.Rainwater is 100% soft water.

 Rainwaters are free of salts, minerals, treated chemicals, and pharmaceuticals. In municipal water, groundwater, and surface water you will find such inorganic matters.

Another reason to harvest rainwater is for the health of your plants. Collecting rainwater and using it can help reduce the salts & chemicals that build up in your soil over time.

The accumulated salts and chemicals can be very bad for any plant, and they can also make them more vulnerable to diseases. This builds up in the soils of your potted plants because dirt doesn’t absorb water like a sponge.

2.Rainwater is slightly acidic—naturally! 

Rainwater harvesting, memes
Rainwater is acidic in nature

The ideal range of a plant’s soil PH level is between 5.5 to 6.5 which is acidic in nature. And Surprisingly, it is the exact Ph range for rainwater!

Likewise, city water PH levels range above 8.5 which is alkaline in nature.

Also, Greywater i.e water from a washing machine or bathroom sink has the same PH level as high as 10.5. Which depends on the types of soaps and detergents that are in it. 

Here, where the role of rainwater comes into the picture. Rainwater helps to flush out the soil which helps to keep your soil pH in perfect balance organically. Hence, irrigation of rainwater is essential. 

3.Rain contains nitrates—an important macro-nutrient

The rainwater contains ‘Nitrate’. Nitrate does what most nitrogen-based fertilizers can’t. It enters directly into the root system and promotes the growth of the plant. 

While the majority of the nitrogen that makes its way through soil is in the form of ammonium. Nitrate is the most bioavailable and easily absorbed by plants because it dissolves in water.

During the rainy season, you should use less fertilizer. As Rainwater itself acts as a great fertilizer for plants

Phosphorus and potassium are also essential for healthy plant growth. Rainwater, however, contains none of these. Rain is very infrequent in some areas, Hence it is important to supplement with fertilizers in the off-season.”

Rainwater is the ultimate sustainable resource. Rainwater harvesting isn’t a new idea – civilizations have been using rain as a source for irrigation since the beginning of agriculture. As far as the earth’s water goes, rainwater is the purest form.

Also, Read l Green thumb rule for Gardening

In Rainy Season, Let nature do the work to water your plants.

In nature, plants have lots of little rains that fall on them. These small raindrops seep through the leaves and nourish the roots, making them lush and healthy. The rainwater harvesting technique is great. Because due to it, many plants have plentiful microscopic roots that are saturated with water.

When these roots are exposed to water, they start to grow rapidly. As a result, most of our lawns, gardens, and other aquatic areas would benefit from having a lot more rainwater harvesting plants.

Still, have any questions? Do let me know in the comment section

For quick response to your Gardening queries do connect me on Instagram handle @roots_grow

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Happy Gardening!

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