How to Join Granny Squares with an Invisible Seam
Stitched joins (or seams) use a needle to connect your granny squares or crochet pieces — and they’re a simple, reliable way to achieve beautiful results. Whether you want a completely invisible finish or a decorative accent, there’s a stitched join for every style.
Here is an easy technique to get you started.
The invisible seam works by picking up the outer loops of each stitch, creating a flat join that almost disappears once tightened.
It’s a great technique for granny square blankets, cushion covers, and other projects where you want the focus to stay on the squares themselves rather than the join.
Avoiding Messy Seams
Before joining your granny squares, block them first to even out the edges and make sure every stitch lines up neatly. Once your squares are aligned, use stitch markers to secure the corners — this keeps everything in place and prevents your pieces from shifting as you work.
Invisible Seam Stich
Also known as the mattress stitch or ladder stitch, this method is perfect when you want to join pieces without adding any visible seam. It creates a smooth, clean finish — ideal for projects where you want the focus to stay on the crochet itself..
Instructions
Hold your pieces together with the right sides facing out. Make sure all stitches line up neatly along both edges. (See image 1)
For this stitch, insert the needle through the top centre of each stitch. Looking at image 2, you’ll see that we’re working around the lower part of the loop, not the top edge that’s closer to you. (Also shown in image 3.)
Insert your needle through the top centre of the first stitch on one side. (See image 4.)
Bring the needle up through the bottom centre of the next stitch on the same side.
(See image 5.)Repeat these steps on the opposite piece, matching each stitch as you go. (See image 6.)
Every few stitches, lay your work flat and gently pull both ends of the yarn — you’ll see the seam disappear as the edges draw together.
✨ Tip: Keep your tension even — not too tight, not too loose — for a perfectly invisible finish.
Joining granny squares made simple 🪡
See how to create a smooth, seamless join in just a few easy steps.
Once you’ve mastered the invisible seam, joining granny squares becomes quick, tidy, and almost effortless. It’s a simple technique that makes a big difference to the finished look of your project.
Give it a try on your next granny square project and enjoy the clean, seamless result.
Read More
How to Join Crochet Squares: 3 Easy Methods I Use
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Understand stitch heights from slip stitch to taller stitches so your crochet fabric behaves exactly as you expect.5 Powerful Ways Crochet Granny Squares Changed My Routine
Discover why keeping a granny square project on the go can build confidence and creativity.Crochet Patterns Made Easy: Read, Adapt and Customise
Learn how to confidently read and adapt crochet patterns so you can make each project your own.
What Next?
Now that your squares are joined, you have two satisfying finishing steps:
Join your rows together (use the same method for consistency)
✨ Get the Crochet Pattern Customization Kit: This download it full of tips, techniques and cheat sheets to help you make each project uniquely yours. Get it here.
🧺 Try the Weekend Crochet Basket Mini Course: Looking for a quick, satisfying project to practice your stitches? The Basket Mini Course is perfect for creating a beautiful finished piece in just a weekend. Start it here.
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Joining granny squares neatly can make a big difference to the finished look of your crochet project. In this guide, you’ll learn how to join granny squares using an invisible seam — a simple technique that creates a flat, almost seamless join. It’s perfect for blankets, cushion covers, and other patchwork crochet projects where you want the focus to stay on the squares themselves. Follow the step-by-step method to create a clean, professional finish that holds your pieces together beautifully.