Easy Step by Step Drip Irrigation for Raised Beds

Follow this easy step by step guide to install timed drip irrigation for your raised beds and enjoy one less chore in the garden!

As I write this post, a heat dome is passing over the United States and temperatures are over 100°F. That means a lot of gardens are thirsty! That also means that a lot of gardeners who are out of town or who are unable to tend to their gardens are freaking out about all of their hard work evaporating in the scorching heat.

Let’s take a hot minute and prevent this problem in our own gardens by creating watering schedules and automatic drip irrigation for raised beds so we don’t need to babysit our green babies constantly! After all, gardens (and vacations) are meant to be relaxing- not stressful.

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At the beginning of your gardening journey? Read my easy guide:
The Homegrown Gardener’s Guide: Growing, Cooking and Living with the Seasons to be prepared and focused.

In addition to providing some freedom from the demands of gardening, drip irrigation offers several other benefits:

• It conserves water—up to 60% compared to overhead watering.
• It delivers water directly to the root zone of plants, minimizing evaporation and runoff.
• It reduces weed growth (you’re not watering everything, just your plants).
• It helps prevent fungal diseases by keeping foliage dry.
• It automates watering, making gardening easier and more consistent.

For the purpose of this post, we will be installing simple drip irrigation for two 8 x 2 foot raised beds that are near a spigot.

Installing drip irrigation for raised beds seems complicated, but I promise YOU CAN DO THIS! I was so intimidated by the idea of installing drip irrigation, that I struggled for YEARS in my gardens trying to drag hoses around and hire neighborhood kids to water while I was out of town. It was always a disaster.

Drip irrigation was such a game-changer. Why didn’t I figure it out sooner?!

I will walk you through this process step by step and include EVERYTHING you need including a printable pdf of materials.

I even include a list of materials and links for purchase at the end of this post.

Here’s the basic outline of what we will be doing to add drip irrigation to your raised beds:

1. Plan the Layout
2. Gather Equipment
3. Set Irrigation Timer at Spigot
4. Attach 3-in-1 Adapter
5. Attach 1/2 Inch Black Tubing
6. Attach 1/4 Inch Supply Tubing
7. Attach 1/4 Inch Emitter Tubing
8. Close the 1/2 Inch Black Tubing

Step One: Plan your Layout

Some people like to plan on graph paper complete with plants and measurements. Others like to wing it!

I recommend at least making a basic sketch of your space and answering the following questions:

• How far away is the nearest spigot?
• How far apart are your raised beds?
• How wide and long are your raised beds?

Keep these numbers on hand to help determine how much equipment you will need.

Step Two: Gather your Equipment for Easy Drip Irrigation

Now, picture your drip irrigation like your circulatory system.

• The heart is the spigot.
• The kidneys are the filter and pressure regulator.
• The arteries are 1/2 inch distribution tubing.
• The capillaries are 1/4 inch tubing.
• The pacemaker is the timer.
• The stents are your irrigation fittings.

Okay, Dr. Gardener, scrub in and grab your gardening gloves!

Step Three: The Spigot and Water Timer

Program your water timer before attaching it to your spigot. If your joints and vision are like mine, you will understand the benefit of programming it at the kitchen counter instead of squatting by the spigot trying to figure it out!

The first time you set one up can be a little confusing. I’ve used several different brands, and they all work essentially the same way. Set the time of day and then cycle through the settings to determine which days you want to water, what time to start and how long to run.

Keep in mind that timers come with 1-4 hose attachments or ZONES/STATIONS. If you have more than one zone, you will need to set up each one separately.

See the photo below with 4 hoses connected to the timer? Each hose/sprinkler is its own unique zone complete with days to water, length of time watering and more than one cycle if needed each day.

The timer in this simple project (pictured below) has only two zones: one for my drip irrigation for my raised beds and one for a regular garden sprinkler. I have the sprinkler hose hooked up to Station 1 and will use Station 2 for drip irrigation.

You can use one zone for drip irrigation that connects to multiple raised beds, but they all will be on that same schedule. You can use different sized emitters for each plant to adjust the amount of water, but we will get to that in a minute.

Ginger Tip: If you have a raised bed that needs to be watered different days or significantly different amounts of water, you will need to set up a separate zone and install a separate drip irrigation system for that bed.

For now, let’s focus on this one project and keep it simple! I’m confident you will be able to tackle more once you have the basic set up mastered.

Step Four: 3-in-1 Faucet Adapter

Next, you need to add the 3-in-1 faucet adapter. This is easy! Simply screw the adapter onto the zone or station you programmed for your drip irrigation just like attaching a hose to a spigot.

Why is it called a 3-in-1?

1. It regulates the pressure of water flowing from the spigot to the smaller diameter tubing
2. It has a small cleanable filter inside to prevent particles from clogging the tubing.
3. The bottom of it has a special ‘shark teeth’ grip to hold the 1/2 inch tubing in place.

Step Five: Connect the 1/2 Inch Distributor Tubing

Remember, the 1/2 inch tubing is like the main artery for all of the 1/4 inch drip tubing. We add this to the 3-in-1 adapter and then align it along the raised beds.

Ginger Tip: Look closely at the 1/2 inch black distributor tubing! There should NOT be emitter holes along the tubing.

Push the end of your 1/2 inch distributor tubing into the 3 in 1 adapter opening on the bottom so that the ‘shark teeth’ catch securely. You should not be able to pull it out once it is secure.

Your spigot should look something like this when you are done:

This is where your first two measurements are needed.

The distance from your spigot to your farthest raised bed(s) will be the amount of 1/2 inch drip irrigation tubing that you need. Add a few extra feet for repairs/changes/future beds. I run the 1/2 inch tubing from the spigot to the beds on the ground. This serves as the main artery to each of the beds.

In the next photo you will see where I hid it on the ground behind the raised bed and curved it around the deck post to the next one.

If you have tight corners to navigate, cut the 1/2 inch tubing with your utility scissors and use a 1/2 inch “L” connector to angle it accordingly.

I used 1/2 inch tubing up the sides of my raised beds at my last garden and used a “T” connector to make it sit flush with the ground and raised bed. This time around, I chose to skip that step and go straight to the 1/4 inch tubing. Both methods work fine.

If you make a mistake and need to extend the 1/2 inch tubing, use the straight connector to connect open ends together.

Ginger Tip: If you find it difficult to squeeze these connectors into the 1/2 inch tubing, set the black tubing in the hot sun to make it more pliable and wear rubber garden gloves to get a better grip on the plastic pieces.

I’ve also found connectors with the same ‘shark teeth’ as the 3-in-1 adapter which make them much easier to connect. However, they won’t ‘swivel’ once they are hooked in place which can make the tubing angle out funny if it’s not inserted exactly right.

Step Six: Connect the 1/4 Inch Supply Tubing

Look carefully at your 1/4 inch tubing. The one without holes is the supply tubing. It’s doing the same job as the 1/2 inch tubing, but on a smaller scale.

We are connecting it to the black 1/2 inch tubing on the ground and running it up the sides of the raised bed.

Grab the connector tool and punch a hole in the black tubing where you want the 1/4 inch line to be.

Then push a small straight connector fitting into the hole until it is secure. That’s the little guy in the middle of the next photo.

Now push the other end into the 1/4 inch supply tubing until it’s secure.

Now that you have the 1/4 inch supply hose at the top of the raised bed, let’s start dripping!

Step Seven: Attach 1/4 Inch Emitter Tubing

This is the tubing with the holes in it. You will find a bump with a hole spaced about every 10-12 inches along the tubing. This is where the water drips out into the soil.

Put an ‘L’ shaped connector (the little ones!) in the end of the emitter tubing and attach it to the 1/4 inch supply tubing. Excuse the dirt under my finger nails! Occupational hazard 🙂

Using your third measurement, calculate evenly spaced rows of emitter tubing that run the length of your raised bed and are about 6-10 inches apart. Lay the tubing down in your chosen pattern and secure with the landscape pins as needed to keep it from moving around too much.

I already had plants in this raised bed and therefore had to arrange the tubing around them carefully. Here is a photo of drip irrigation for raised beds that I did at my last garden when I planted some radishes. You can also see in this older photo that I ran the 1/2 inch black tubing up the side and across the top of the raised bed instead of the 1/4 inch supply tubing. Either way works!

I find the ‘racetrack coil’ pattern works well! However, you can do whatever you like. You can run straight rows and connect them with the ‘T’ and ‘L’ connectors. That’s a little more labor intensive, but it would work well.

Important!! Add the ‘Goof Plug’ at the end of your 1/4 inch emitter tubing to prevent water leaking out the end!

Ginger Tip: The goof plug is essential. If you punch a hole by mistake in the 1/2 inch black tubing, pop in a goof plug and it plugs the hole.

Step Eight: Add the 1/2 Inch Tubing End Closure

Before you turn on the water, you need to close the end of the 1/2 inch black tubing! Take a figure 8 end closure piece and slide it onto the last several inches of tubing. You definitely do not want water running out the end or you won’t have any pressure for the drip irrigation system to work.

Next bend the tubing towards your hand and slide the end closure over this part to create a lock.

Now the drip irrigation for raised beds is complete and ready to turn on!

Turn the water on at the spigot. The timer will prevent any water from shooting out the zone connectors until activated.

On your irrigation timer is a manual option. Press the main button to activate manual mode, cycle to the correct zone for your drip irrigation, run for 2 minutes and press again to start.

You should hear the timer click and water rush through the tubing.

Inspect all of the connections and look for leaks. Make sure the drip tubing is indeed dripping! Now is the time to adjust your 1/4 inch emitter tubing around with the landscape pins to make sure they are dripping in the right spots. You want your drip irrigation for raised beds functioning properly!

Final Thoughts and Suggestions:

Your simple drip irrigation for raised beds is now complete. If you want to add on or fine tune your set up, there are infinite possibilities.

Experiment with your timer settings. I find watering for 20-30 minutes every other day works well. If you are in a heat wave, you might need to adjust. In the spring and fall when rain is more common, I water less.

Keep in mind that we did a simple drip irrigation for raised beds in this post. If you are adventurous, try adding some drip emitters instead of using the 1/4 inch emitter tubing on the soil surface.

This means that instead of adding the 1/4 inch drip emitter tubing around the raised bed surface, you use more of the 1/4 inch supply tubing (no drip holes) and add special emitters at each plant area you want watered.

Once you have the hang of it, try adding drip irrigation to container pots and window boxes! Simply run 1/4 inch supply tubing up through the hole in the bottom of the container before filling with soil and plants. Then add emitter tubing or emitters at the soil level.

They even make white and beige tubing for camouflaging the water supply to window boxes.

You can also use drip irrigation in landscape beds. Instead of emitter tubing, attach soaker hose tubing around shrubs and trees to cover larger areas.

Get creative and never worry about watering your plants again!

Links to Materials for Drip Irrigation for Raised Beds

Irrigation Timer

3-in-1 Adapter

1/2 Inch Distributor Tubing

1/2 Inch Tubing Connectors and End Closure

1/4 Inch Tubing Connector Fittings

1/4 Inch Supply Tubing

1/4 Inch Emitter Tubing

Landscape Pins

Tubing Hole Punch

Scissors

For more advice about raised bed gardening, read my post The Pros and Cons of Raised Beds where I share my experiences with wood and metal raised beds of varying heights and construction.