How to Join Granny Squares with a Flat Seam that’s Invisible

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Do you want to learn how to join granny squares with a flat seam? In this tutorial, I’ll show you how to easily join granny squares with a flat seam for a ‘fused at the edges’ look. No hooks or special skills are required!

UPDATED: JULY 27, 2023 BY BRITTANY
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How to join granny squares with a flat seam step-by-step.

There are many ways to join granny squares, each with its own purpose and suitability. The “invisible seam” is the best way to join granny squares when you want a completely flat seam.

This technique offers a nice change of pace when working on larger crochet projects. Your crochet hooks can sit this one out!

Don’t know how to crochet a granny square yet? No worries! Try our How to Crochet a Granny Square guide that’ll walk you through it step-by-step.


Join Granny Squares With A Flat Seam

One of the easiest ways to join granny squares is with the invisible seam. All you’ll need is a yarn needle, A bent tip needle like this one will make it easier, and of course, some yarn. It’s best if you choose a color that is present on the outer round of one or both of the granny squares you want to join.

The invisible seam blends into the last round stitches of the granny square. So for the seam, it’s best to choose a color on one or both of the granny squares you want to join. (I’m only using gray to contrast so you can see what I’m doing.)

For example, if the last round of one granny square is gray and the other is white, you can use either color.

Step 1:
Thread the yarn needle with a piece of yarn. Working in 24″ sections is pretty comfortable. But if you want to reduce the number of ends to weave in, cut a piece of yarn that’s 6 or 7 inches longer than the project will be.

Step 2:
Arrange the first two squares with the right sides facing each other. Starting at the corner chain with the granny square closest to you, catch the back loop of the chain. (We’ll call this granny square #1). Then catch the back loop of the chain on the opposite granny square (we’ll call this granny square #2).

The back loop of the chain on Granny Square #1
The back loop of the chain on Granny Square #2
Pull the yarn
through

Step 3:
Run the needle through the back loop of the next stitch of granny square #2. Then run the needle through the back loop of the adjacent stitch of granny square #1.

The back loop of the next stitch of Granny Square #2
The back loop of the next stitch of Granny Square #3
Pull the yarn
through

Step 4:
Run the needle through the back loop of the next stitch of granny square #1. Then run the needle through the back loop of the adjacent stitch of granny square #2.

The back loops of Granny Square #1 and #2
Pull the yarn
through

Repeat steps 3 and 4 throughout the joining process. To add more granny squares, lay them next to the first two with right sides facing inward. Start with the same “starting chain” seen in the image above, and follow the same steps.

*The seam is shown loose so you can see the direction of the stitches. You’ll want to pull the yarn tight as you seam.

Join Granny Squares With a Flat Seam Step-by-Step Tutorial

If you’re more of a visual kind of learner we have you covered with this step-by-step tutorial. Once you see it in action, you’ll realize how effortless and efficient this technique can be.

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Video not displaying? Watch this tutorial on YouTube instead.

Right-Handed Tutorial on YouTube

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Is This The Best Way To Join Granny Squares?

The invisible join is the best way to join granny squares in some instances. If you want a result that gives the impression that the squares are fused at the edges, the invisible seam is perfect. If you’d rather your join be more of a statement, you may consider one of the other joins outlined in our post here.

For more classic ways to join granny squares check out our article here.

Does the Invisible Seam Create More Ends to Weave In?

The invisible seam can create extra ends to weave in, but it doesn’t have to. Simply by using one long piece of yarn, you can reduce the loose ends to weave in by a lot. Yet we understand that dealing with such a long piece of yarn can sometimes become quite a headache.

Flower Granny Square with Invisible Seam Join.
Flower Granny Square with Invisible Seam

Enter the magic knot, a nifty little trick that can save the day. With it, you can work with shorter, more manageable sections of yarn and piece them together so they don’t create more ends. We have a detailed guide on using the magic knot for granny squares here. This little trick will save you hours!

We understand that the idea of adding knots to your project might not appeal to everyone. Some crafters prefer a knot-free finish. Yet for others, the magic knot can be the perfect solution to complete their project with ease.

If you’re open to trying new methods and adding a touch of magic to your crochet journey, give the magic knot a chance. It might be what you need to power through and finish your project!

More Granny Square Tips!

At B.Hooked, we’re passionate about granny squares. So we’ve created a wealth of resources to help you create the most stunning versions. If you haven’t discovered the magic of “wet blocking,” we recommend trying this technique next. We have a comprehensive guide that will help. It’s more in-depth than the one you’re reading now, and it will walk you through the process, step-by-step.


Over the years, crocheters have shared many tips for crocheting a perfect granny square. But the burning question remains: do any of these tips work? Well, we’ve taken it upon ourselves to uncover the truth. In our dedicated post, we test various techniques and assess their effectiveness. Follow the link provided to access our insightful findings and uncover the solutions you’ve been searching for.


Now let’s talk about a clever solution to changing colors every round in without creating a bunch of ends to weave in. By utilizing a simple trick we’ll demonstrate in this post, you can reduce the number of loose ends to two!

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