Learn How to Join Crochet Squares Seamlessly Like a Pro

Learn how to join crochet squares with the mattress stitch for smooth, invisible seams. Perfect for blankets, pillows, and garments!

How to Join Crochet Squares with Ease

Crochet squares, like granny squares and afghan squares, are such a joy to make. But when it’s time to join them, it can feel a little overwhelming. I’ve been there!

That’s why I want to share the mattress stitch with you. It’s my go-to method for creating smooth, invisible seams that make my square blankets, pillows, and wearables look polished and professional.

And the best part? It’s easier than you might think!

In this post, you’ll find everything you need, including a step-by-step photo tutorial and a helpful video tutorial.

The photo tutorial below will walk you through each step, while the video will show you exactly how to handle tricky spots. If you’ve been wondering how to join crochet squares, you’re in the right place.

Let’s make your crochet projects shine together!

Mattress Stitch join tutorial for beginner by www.mycrochetory.com

Getting Ready to Join Crochet Squares

Before you start joining your crochet squares, the first thing to do is block your squares.

Blocking helps even out the edges and ensures that all your squares are the same size. This step is especially important for granny squares, which can sometimes stretch unevenly during crochet.

Next step, gather your tools. You’ll need a yarn needle, a crochet hook, and stitch markers.

The right tools – and the right hook size – make the joining process smoother. Check that your yarn matches the weight and color of your squares. This small detail can help the joins blend seamlessly, especially when working with different colors of yarn.

Lay your squares out and decide on their arrangement. Do you want a random pattern or a planned design? Taking a little time to arrange them now will save you from redoing joins later.

Once you’re ready, mark the corner spaces and edge stitches with stitch markers. This will keep everything aligned as you work through your project.

With your squares prepped, you’re set for an easy join and will know exactly how to join crochet squares with confidence.

Why the Mattress Stitch is My Top Pick

The mattress stitch has saved me so much time and effort over the years. It’s straightforward, and the results always impress.

This method is worked on the wrong side of your squares, keeping the right side perfectly smooth. It’s exactly what you need for square beautiful blankets or larger projects.

To do the mattress stitch, you simply thread a yarn needle, insert the needle into the edge stitches or back loops of your squares, and gently pull the working yarn to close the seam.

It’s like magic watching the seam disappear! The mattress stitch is truly the best way to achieve a smooth and professional finish.

Even if your squares have slightly different stitch counts, this method adjusts beautifully. I used it recently on my Pinwheel Granny Square Blanket, and the joins were so neat you couldn’t even tell they were there.

This method also allows for a different look depending on the tension and alignment. It’s versatile and suits almost every crochet project.

If you’re exploring different ways to join squares, the mattress stitch is a must-try for its invisible join and clean results.

How to Join Crochet Squares: Video Tutorial

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Joining two fabrics

Step 1: Prepare Your Crochet Motifs

Place two pieces of your crocheted motifs on a flat surface with the RIGHT SIDE facing you. This ensures that the seam will be neat and invisible when viewed from the front.

Thread your yarn needle with the same yarn you used to crochet your motifs. For this tutorial, I used contrasting red yarn to clearly show the mechanics of the mattress stitch. Using matching yarn will create a seamless finish.

Step 2: Start at the Corner

Take the first square and insert the needle from the top of the first corner stitches, then bring it out through the bottom of the second corner stitch. Pull the yarn through gently.

Repeat this step with the second square, starting at the far-right corner space. Pull the yarn gently but not too tight.

At this stage, ensure all stitches are clearly visible to make the process smoother.

Step 3: Work Between Stitches

Return to the first square. Insert the needle into the same chain where it came out previously, then bring it out through the next stitch, working behind the back loop.

The most important thing here is to keep the tension consistent for a neat seam.

Repeat this process on the second square.

Insert the needle from the top, between the front and back loops of the chain where the yarn came out, and make the needle exit from the center of the next stitch.

Continue this sequence until you run out of stitches and reach the corner chains of your squares.

If needed, refer to the previous step for guidance.

Step 4: Secure the Seam

Work back and forth between the squares. Occasionally stop to gently pull the working yarn tighter, making the yarn between stitches invisible.

Be sure to select corresponding stitches and chains from both squares to ensure a smooth seam.

The seaming yarn disappears.

When you reach the corners, insert the needle into the top corner chain of both squares.

Make sure to work the last stitches into the corners.

Then, fasten off and weave in the loose ends.

As you can see below, the red yarn now doesn’t show, and the seam is totally invisible.

When worked correctly, the squares beautifully zip together without distortion. This is the magic of the Mattress Stitch.

Here, you can also see the back of the seamed motifs and the stitch is almost invisible even there.

Joining sets of fabrics

To join sets of squares, begin by following the steps above for two squares. Once the initial pairs are joined, lay the sets side by side.

Start joining from the right corner chain and continue across the stitches, ensuring that all corners align properly.

Work through corresponding stitches and chains as you did before.

At this point, make sure that you work through the correct stitches and corner chains before start joining the corners.

Step 1: In the square 1, insert the needle into the top of the last stitch and out of the first corner chain.

Step 2: In the square 2 repeat the Step 1.

Step 3: Here, the needle goes into the top of the corner chain (where it came out of before) in the square 1 and up out of the top of the corner chain (right at the first stitch) in the square 3.

Step 4: Repeat step 3 working between square 2 and 4.

Step 5: Insert the needle into the top of corner chain and up out of the top of the next stitch in the square 3 and then repeat this is in the square 4.