How To Collect Rainwater For Gardening (Must Read)

How to Collect Rainwater for Gardening? Yes! A post dedicated to helping those in areas currently undergoing droughts.

California: 93.91 percent of the state in severe drought or worse

Nevada: 86.99 percent

Oregon: 68.48 percent

Utah: 34.38 percent

Arizona: 29.26 percent

Idaho: 26.19 percent

Washington: 23.76 percent

New Mexico: 11.95 percent

How to collect rainwater for gardening water collection system

Rainwater Collection System
Image Credits: AlmostBrazilian [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)]

Are you are trying to cut on your water bills or just have a great interest in the conservation of water?

Well, today is your lucky day as rainwater harvesting is the answer you’ve been looking for.

Chemically treated water might be good for washing your car, drinking, filling pools but it will never be good for your plants.

That is why collecting rainwater for gardening is a very great option.

You will be able to eliminate all the salts and harmful chemicals that may be damaging to your crops.

Rainwater comes with lots of advantages that your plants will love.

To start with, rainwater is naturally soft meaning it has few to none chemicals.

In addition to that, collecting rainwater helps to keep your water bills to a minimum.

At the same time, it plays a key role in offsetting the costs of water bills that you will have during the dry period.

There is a wide variety of ways that you can use to store rainwater and we will discuss that too in this article.

How to Collect Rainwater without Gutters/Roof?

It has been used as an environmentally friendly way of rainwater catchment for use in gardening as well as across landscaping.

Rainwater for gardening collection is a technique that has been widely practiced over the centuries.

In most locations today, you will find that most people build their houses with roof gardens that will absorb the rainwater.

Hence growing a layer of grass. If you don’t have a roof garden though, you can still collect rainwater and use it.

Rainwater collection is always easier with gutters around the roof. But, there are still methods that you can use to collect the water even without gutters. Some of these methods include:

Catchments
On a rooftop, a catchment area is where there is a certain pathway that water follows. If you have a slanting rooftop, then you already know that all the water is directed downwards.

On the rooftop where two sections meet there will be the formation of a single catchment that will naturally force the rainwater to flow in a stream.

The best thing about these catchment areas is that they focus the water to flow in a certain direction just like the gutters.

This means that, if you look carefully, there will be a section of your house where the rainwater will be falling more heavily than the others.

In that case, you can use a drainage pipe or some collection vessels to collect as well as distribute the water. This is a better way of collecting water than just leaving it to fall at the corners of your house.

Diverters
Diverters, on the other hand, are some type of metal sections that you can install either on your flower beds or just above your doorways.

They help to prevent these two parts from being hit by frequent rainfall. But you need to understand that diverters and gutters are two different things.

The diverters are just some short pieces of aluminium a few feet long. They are in most cases also fitted underneath the roof shingles hence forming what looks like a metal wall.

The diverters too tend to form concentrated streams of rainwater so you can take advantage of that by channeling the water and collecting it.

Landscaping
This may sound ridiculous to most people, but you can actually use the land itself as a way of channeling and collecting water.

You will do this by looking for the low-level areas in your location where rainwater tends to stagnate or collect when it rains.

Such areas are the best for placing a diverter pipe that can then be used to carry water away to your collection point.

If you don’t have the low-level points in your location, then you can build some natural and slightly depressed valleys as you landscape at the same time. This will help you to carry the water evenly throughout your garden.


Barrels
Barrels are the most ancient yet the most popular method of water collection.

Rainwater barrels come in different types and you will easily find them in landscaping and gardening centers in your location.

The deal with barrels is that you just stand them in your garden and they collect water as the rain falls.

When using barrels, you don’t need gutters or rooftops to be able to collect water.

In some cases, you will find that the barrels are connected to some underground pipes that direct water to a certain area.

Since there are many styles of barrels that you will find in the market, be sure to find one that fits in the landscaping plan that you are working with. You can also improvise homemade barrels with locally available materials in your home.

Rain Water Barrels
Those who have been practicing rainwater harvesting without a doubt understand how critical it is to have a high-quality barrel. In very many instances, people have bought poorly made barrels that have ended up leaking the water from the bottom.

rainwater barrel

Rainwater Barrel
Image credits: Virginia State Parks staff [CC BY 2.0 (https://creativecommons.org/licenses/by/2.0)]

Features of a Good Rain Water Barrel

Overflow protection:
During very heavy rainfall, there is a chance that your rainwater barrel may end up collecting more water than you anticipated.

That is why you need an overflow valve to divert as well as regulate all the excess water when the barrel is already filled to the brim.

This overflow valve can either be connected to a storage tank or additional rainwater barrels.

This feature may lack in some barrel designs but most of the modern designs come with an overflow protection valve.

Mesh Screen Filter:
This is another important feature that should never miss in a good rainwater barrel. This mesh screen helps in keeping leaves, insects, and any other form of debris from entering in the storage section.

At the same time, where there is stagnant water, it is a good breeding place for mosquitoes to lay their eggs.

You may also find some barrels that come with a completely covered top with just an opening that channels water in the barrel.
Spigot:
This is an outlet that helps to dispense water from the rainwater barrel to the outside environment. You can attach a garden hose or even just fill the water into a basin.

A great spigot should be made from brass so that you can prevent rust.

More to that, you should ensure that the spigot is located at the bottom part of the barrel. This makes it easier to empty the contents of the barrel through the help of gravity.

All in all, you may find barrels that come with a threaded bulkhead where the spigot should be attached.

Materials for Making a Rain Barrel

wood barrel

Wood Barrel
Image Credits: Tsanghexshing [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)]

Barrels come in a wide range of materials. While the plastic barrels are the best, it is important to know about the rest so that you can be able to make a good selection when buying one.

Plastic Resin
These are the most common types of barrels and that’s for a good reason. That is because they are easy to clean and very light in weight.

More to that, they are not biodegradable meaning that they cannot break down as a result of bacteria action.

And as much as the plastic resin is UV protected, the rain barrels should be kept out of the sun for longevity.

Stainless Steel
This type of barrels has a couple more advantages when compared to the plastic ones.

And for that reason, they are used to store a large amount of water for longer periods of time.

You will find them being used as industrial tanks or even cisterns for supplying water in a community.


Clay/Stone
The stone and clay barrels tend to be smaller as they are very bulky. In most cases, they are only used for decorative purposes rather than for water conservation.

All in all, they can still be used to collect rainwater. However, you must choose a fixed location for the barrel where it won’t be moved as they can be very heavy.


Wood
These ones too have been used throughout history for a wide array of purposes.

And that includes collection and storage of water. Wood barrels are very attractive but they tend to be very demanding in terms of maintenance.

That is because wood is biodegradable and it not taken care of it can grow mold and harbor insects as well. It is actually advisable that you invest in treating your wood barrel before using it for harvesting rainwater.

How Long Can You Store Rainwater?

how to collect rainwater for gardening rainwater barrel on porch

Image Credits: USDA NRCS South Dakota [Public domain]

When it comes to water storage, there are very many myths that surround this a particular topic.

Therefore, in this section, I will give you all the facts about water storage.

To start with, stored rainwater does not expire or go bad.

However, it can become chemically or biologically contaminated.

The contamination may give the water a certain unusual taste but that’s no expiration.

Actually, the taste can be easily removed by purifying and rotating the water.

This means that, if you have stored water that started out as clean in a cool, dry and dark area, then it can be stored indefinitely.

However, you need to ensure that there are no harmful chemicals nearby, harsh fumes and it is not placed directly on concrete.

All in all, you need to rotate this water from time to time. But that’s just for the sake of your peace of mind.

More to that, when storing your water, you need more than just a filter. A purifier too would do some good.

For instance, chlorine dioxide is a great alternative for killing all types of micro-organisms that dwell in water like parasites and bacteria.

That is why chlorine dioxide is great for treating barrel water before storage or any other water that has been collected from a natural source.

The purifiers alone still cannot remove all the turbidity in the water. That is why it is recommended to use both a filter and a purifier to ensure ultimate cleanliness of your water.

Is Rain Water Collection Illegal?

While the collection of rainwater might seem like a normal thing, you will be surprised to learn that it is illegal in some states. The link provides 18 States.

If you live in Colorado especially, you can relate to what I’m talking about.

The water laws in Colorado are so strict that even rainwater collection is virtually prohibited.

That water that patters off on your porch is not yours at all. This makes it very difficult for a regular homeowner to set up any kind of a rainwater harvesting system.

Currently, in the United States of America, there are strict laws and regulation that have been put across nine states in regard to the collection of rainwater.

All in all, the severity of those laws tend to differ in each of the states.

For instance; the Colorado Rainwater regulation law passed in 2016 allows homeowners to collect only two barrels.

That is roughly a total of 110 gallons and this should only be on their rooftops. Therefore, before you set up your rainwater barrels, be sure to confirm with the authorities if it is legal to collect rainwater in your state.

In Summary…
As we have seen in the article above. Rainwater for gardening is great for plants and soil health.

Besides being the preferred source of water for plants, it is a healthier option too.

That being the reason, you need to collect, store and keep clean water in order to aid your plant to achieve optimal growing conditions.

All in all, you need to be careful with the storage and collection method you choose.

That is because some like open barrels if left untended to, they can become a breeding ground for mosquitoes.

Also, it is necessary to clean the collection and storage means once in a while to ensure that the water you collect remains clean and fit for use over a long period of time.

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