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3 Reasons to Use Rain Barrels to Conserve Water in Your Backyard Garden

Written by QSB | April 7, 2025 at 2:00 PM

Are you ready to transform your garden into an eco-friendly paradise while saving money on your water bill? Whether you’re just beginning your gardening journey or you’re a seasoned green thumb, rain barrels could be just the solution that you’re looking for to harness nature’s free water — rain, snow, and other precipitation — without all the hassle. 

You might be asking yourself: What are the benefits? Will a rain barrel attract mosquitoes? Can it really cut costs? How do I set it up without a hitch? How long does a rain barrel setup last?

Today, we’ll explain exactly what they are and how they work, share practical tips to avoid common mistakes and walk you through every step. From selecting the perfect spot in your yard to installing and maintaining your system, we’ll make sure that you know exactly how to get started.

Why is Water Conservation So Important?

Water is one of our most valuable resources and every drop counts. When you conserve water, you’re not just cutting down on your monthly bills — you’re also playing your part in protecting the environment. Using less treated water means less energy consumption and fewer chemicals in our waterways. And when droughts or water restrictions hit, having a backup water source can be a real lifesaver for your garden.

That’s where rain barrels can be a fantastic tool for your backyard garden. By collecting the rain that would otherwise run off into your gutters or into the street, you’re harnessing a free, natural resource so that you can water your garden anytime. It’s an easy, cost-effective way to create a more sustainable (not to mention cost-effective) backyard garden.

What Is a Rain Barrel and How Does It Work?

A rain barrel is a water harvesting system that is designed to capture, store, and dispense rainwater for your garden.

Here’s a closer look at how these systems operate and why they’re both efficient and eco-friendly:

How Rainwater Collection Works: 4 Simple Steps

  1. Collect Rainwater From Your Roof
    When it rains or snows, your roof acts as a large collection area. This precipitation that falls on your roof follows the line of your gutters to the downspout as it normally would. 

  2. Funnel the Collected Water into the Rain Barrel
    When you have a rain barrel system in place, there is a diverter added to the downspout, which redirects the flow of water from the downspout into the barrel. By controlling the flow, it ensures that most of the water is captured rather than spilling over or flooding unwanted areas.

  3. Store Water Until You’re Ready to Use it
    The rain barrel itself is a container (most commonly made of durable plastic) that holds the water until you’re ready to use it. Many rain barrels come with built-in features like overflow pipes (to safely channel excess water during heavy rains) and screens or lids to keep out debris and insects.

  4. Dispense Water From a Spigot
    When you need water for your garden, a spigot — usually installed near the bottom of the barrel — allows you to easily tap into your stored water. This setup is especially useful for irrigation systems like drip irrigation, which distribute water directly to plant roots with minimal waste.

3 Reasons to Use Rain Barrels in Your Garden

1. Save Money on Water Bills

Using rainwater means you rely less on expensive tap water, reducing your monthly utility bills without sacrificing a thriving garden. Depending on your climate and average rainfall, a single 55-gallon rain barrel can collect several hundred gallons of water annually — water that would otherwise go to waste. If you set up multiple barrels or a larger collection system, the savings can be even more substantial, potentially cutting irrigation costs by 30-50%.

Think about it this way: during peak summer months, outdoor watering can account for up to 50% of a household’s total water usage. By harvesting rainwater, you tap into a free resource that keeps your lawn, flowers, and vegetables hydrated without adding to your bill. Plus, with rising water costs in many areas, your savings will only grow over time.

2. Reduce Your Environmental Impact

Every time you use rainwater, you’re reducing stormwater runoff. Every time you use rainwater, you’re doing more than just saving money — you’re actively helping the environment. One of the biggest benefits of rainwater collection is reducing stormwater runoff, which can overwhelm drainage systems, cause soil erosion, and carry pollutants like fertilizers, pesticides, and debris into local waterways. By capturing and using rainwater on your property, you slow this process down, keeping your soil healthy and protecting nearby rivers, lakes, and groundwater sources.

Additionally, relying less on treated municipal water reduces the demand on energy-intensive water treatment plants, cutting down on greenhouse gas emissions. It’s a simple change that contributes to a more sustainable lifestyle, supporting conservation efforts without requiring drastic changes to your routine.

3. Ensure a Reliable Water Source

During dry spells or when water restrictions limit how much you can use from the tap, your rain barrel provides a steady supply of water for your plants. This is especially helpful in drought-prone areas (like Texas!) where even short periods of extreme heat can stress your garden.

For those using drip irrigation systems or soaker hoses, rainwater offers an efficient and consistent way to keep plants hydrated, as it’s naturally soft and free of chlorine and other chemicals found in tap water. Even if you’re just using a watering can, having a reserve of rainwater means you don’t have to worry about your garden suffering when local restrictions tighten.

Tools and Supplies You’ll Need for Your Rain Barrel

Before you begin, gather these essentials to ensure a smooth installation:

  • Rain Barrel or Rain Barrel Kit: Choose between a DIY setup or a pre-made kit based on your comfort level.
  • Downspout Diverter: This funnels your roof’s runoff directly into the barrel, maximizing the amount of water you can collect.
  • Hose or Spigot: Allows you to easily access and use your stored water.
  • Optional: A Garden Shed: Not only can you mount your rain barrels here, but it also serves as a safe spot to store hoses, diverters, spigots, and maintenance tools.

Pro Tip: Look for rain barrel kits that include UV-resistant materials and sturdy spigots to ensure they’ll last for years to come.

Step-by-Step Guide to Setting Up a Rain Barrel

Setting up your rain barrel is simpler than you might think with a bit of guidance.

Follow these steps to install your rain barrels the easy way: 

Step 1: Choose the Right Location

Pick a spot directly under a downspout where you’ll get maximum runoff. If you have a garden shed nearby, that’s even better — it provides stability and easy access for maintenance.

Step 2: Select and Prepare Your Barrel

Decide whether you’re using a pre-made rain barrel or converting an existing container into one.

  • Pre-made barrels come with built-in features like spigots and screens.
  • DIY options can be cheaper, as long as you make sure they are high-quality. Look for containers that are clean and safe (preferably food-grade if you’re watering edible plants), then add a spigot and a secure mesh cover to keep out debris and pests.

Step 3: Install the Downspout Diverter and Spigot

Attach your diverter to the downspout according to the kit’s instructions. This is key to making sure that water flows directly into your barrel without any leaks. Then, mount a spigot at the bottom of the barrel for easy water access.

Step 4: Maintain Your Rain Barrel

Keep your system in top shape by regularly cleaning the barrel to prevent algae buildup, ensuring that all screens and lids are securely in place to keep mosquitoes and debris out, and inspecting every connection for leaks, especially after heavy rains. 

Level Up Your Rain Barrel Setup With a Garden Shed

To make the most of your rain barrel setup, consider mounting it to a garden shed. You’ll not only take advantage of your shed’s roof to capture rainwater, but you can also keep hoses, diverters, and irrigation tools in a weatherproof space that will protect them from UV damage, rain, and temperature fluctuations. With built-in shelves or hooks, you’ll always have the right tool within reach, saving time and preventing frustration.

By integrating your rain barrel setup with a well-organized shed, you streamline your maintenance tasks and create a more efficient, sustainable gardening setup for your family. 

Make Every Drop Count: Start Your Rain Barrel System Today

Using rain barrels is about more than just saving money. It’s an easy way to make your garden self-sufficient and environmentally friendly. With a quick, one-day setup, you can reduce stormwater runoff, cut irrigation costs, and ensure your plants thrive even during droughts.

Don’t wait — Set up your rain barrel system and give your garden a reliable, sustainable water source for years to come. Start by finding the perfect backyard garden shed to pair with your rain barrels and make your way to greener gardening today.