How to Seam Granny Squares Like a Pro – Invisible Join Method for Blankets, Jackets & More

Granny squares are a beloved classic in the crochet world – easy to make, endlessly customizable, and perfect for both beginners and advanced crafters. But once you’ve made a stack of colorful squares, there’s one crucial question: how do you join them together neatly?

In this detailed tutorial, we’ll walk you through a clean, invisible method of joining granny squares using a crochet hook – no sewing needle required! This technique is ideal for creating jackets, blankets, bags, and cushions with a smooth finish and almost no visible seams on the front.

We’ll start by explaining how to attach two squares together with perfect alignment and tension. You’ll learn exactly which loops to work into, how to avoid visible bumps, and how to scale this method for full rows and larger projects.

In the example shown, the creator used black-edged squares to make a jacket, but to demonstrate the joining technique more clearly, she uses light-colored squares on video. The contrast helps you understand exactly where to insert your hook and how the stitches should look.

Whether you’re making a small cushion cover or planning an ambitious wearable, this method will save you time, stress, and messy seams. It's quick, effective, and gives your projects a polished, store-bought appearance.

By the end of this article, you’ll know:

• How to join two granny squares with a hook
• How to make your seams invisible on the front
• How to expand to multiple rows with perfect alignment
• Creative ideas for using joined squares in jackets, bags, and home decor

Let’s get started and take your granny square projects to the next level!

How to Seam Two Granny Squares with a Crochet Hook – Step by Step

Once your granny squares are complete, it’s time to bring them together. In this method, we’ll use a crochet hook (not a needle) to join two squares from the wrong side, using only the back loops of each stitch. This creates a nearly invisible seam from the front while keeping the back tidy and flat.

Step 1: Identify the Right and Wrong Sides

Lay your two squares flat. The “right side” is usually the more polished side, where colors look more defined and even. For joining, you’ll want to turn the squares so the wrong sides are facing up (right sides touching each other). This way, the seam will be hidden on the inside.

Step 2: Use the Same Hook and Matching Yarn

• Use the same hook size you used to make the squares (e.g., 5.0 mm)
• Use the same yarn color as the border of your squares (for invisible seams). For practice, you can use a contrasting color to see your stitches clearly.

Step 3: Connect the Corner Spaces

Insert your hook into the corner chain space of both squares. Yarn over, pull through both loops, and chain one. This secures the connection and gives you a starting point.

Step 4: Work Through the Back Loops Only

Now, begin joining stitch by stitch. Insert your hook into the back loop only of the next stitch on the first square, then into the back loop of the matching stitch on the second square. Yarn over and pull through both loops, then pull through the loop on your hook (slip stitch).

Repeat this process all along the edge: always into the back loops of both squares, slip stitch to join. This ensures that the seam remains flat and nearly invisible on the right side.

Step 5: Finish the Seam

Once you reach the last stitch, finish with one more slip stitch into the final chain space if needed. Cut the yarn, pull through, and weave in the ends securely on the inside of the work.

Step 6: Flip Over and Admire

Turn your squares over – the front side should show a clean, almost seamless join. If you used the same color yarn, the seam will blend in completely. From the back, you’ll see a neat ridge, which is perfectly normal and adds structure.

How to Join Multiple Rows of Granny Squares – Alignment & Expansion Tips

Once you've successfully joined your first pair of granny squares, it's time to think bigger! Whether you're making a full blanket, a wearable jacket, or a decorative table runner, joining rows correctly is the key to a clean, polished look. Here’s how to do it right:

1. Work Row by Row for Maximum Control

Start by joining all squares in the first row, one by one, using the slip stitch method described earlier. Once your first horizontal row is complete, begin connecting the second row:

• First, join the second row’s squares together (side by side).
• Then, join the entire row vertically to the first row, matching up each corner and stitch.

This ensures the grids line up perfectly both horizontally and vertically.

2. Always Keep Right Sides Facing Inward

When joining rows, continue placing the squares right side facing right side. You’ll always seam on the wrong side, so the final project has smooth, clean joins on the front.

3. Match Stitch Counts and Corners Carefully

It’s essential that each granny square has the same number of stitches per side. If your stitch counts don’t match, your rows will ripple or bulge. Before joining, count the stitches and mark the corners with stitch markers if needed.

4. Use a Consistent Tension

When making your slip stitches, don’t pull too tight or too loose. Keep a gentle, even tension to avoid puckering or gaps between the squares. Practicing on scrap squares first is a great way to master this.

5. Optional: Light Blocking After Assembly

Once all squares are joined, you can block your project lightly with steam or a damp cloth. This will smooth the seams, even out edges, and help your piece lie flat – especially helpful for garments or structured items like bags.

Pro Tip: Take your time! Rushing through the joining process can ruin hours of work. A well-aligned project makes all the difference.

What Can You Make with Granny Squares? Beautiful Ideas for All Skill Levels

Granny squares are more than just a beginner's exercise – they're a gateway to fashionable, functional, and artistic crochet projects. Once you master how to join them seamlessly, a whole world of possibilities opens up. Here are some of the most popular and inspiring ways to use your joined squares:

1. Crochet Jackets and Vests

One of the trendiest ways to use granny squares is in boho-style jackets and vests. Use between 24 and 36 squares (depending on size) to build the main body, then add sleeves, edging, or buttons. Choose a unified color palette or go wild with vibrant contrast – the result will always be unique and eye-catching.

2. Blankets and Baby Throws

The classic granny square blanket never goes out of style. For a full-size throw, you’ll need dozens of squares (e.g., 8x10 layout). For a baby blanket, a smaller arrangement (like 5x6) with soft pastels works beautifully. These make wonderful gifts and heirloom pieces.

3. Decorative Pillows and Sofa Cushions

Join 2 or 4 squares together and stitch them into a simple pillow cover. Add a zipper or envelope-style back and a pillow insert – and voilà! You have a cozy, handmade accessory for your home. This is a great way to use leftover yarn in creative color combinations.

4. Bags, Totes, and Clutches

Use 6 to 12 squares to create a shoulder bag or tote. Line the inside with fabric for stability and durability, add a zipper or button closure, and attach a strap. These handmade bags are functional, stylish, and make amazing handmade gifts.

5. Table Runners, Placemats, and Wall Art

Granny squares also shine in home decor. Join a few squares in a single row for a rustic table runner, or stitch 2x2 or 3x3 layouts for unique placemats. You can even hang a strip of squares as a wall hanging with added tassels or beads for a boho vibe.

Tip: Mix solid-color squares with multicolored centers, experiment with yarn textures, and don't be afraid to combine traditional with modern aesthetics. Every project will feel truly yours.

Final Thoughts: Granny Squares – Classic, Creative, and Always in Style

Granny squares are more than just a nostalgic crochet motif – they are a powerful building block for modern, artistic creations. Whether you’re crafting something small like a pillow or taking on a full jacket or blanket, learning how to join your squares cleanly elevates your work from “homemade” to “handmade and professional.”

With the step-by-step instructions in this guide, you now have all the tools you need to seam your granny squares seamlessly, align multiple rows, and bring your creative ideas to life. There’s something incredibly satisfying about watching separate squares come together into a beautiful, unified piece.

Now it’s your turn! What are you planning to make with your granny squares? A jacket, a throw blanket, or maybe a colorful tote bag?

💬 Leave a comment below and let us know about your project – or share photos of your work! We’d love to see how you use this method and inspire others in the crochet community.

✨ If this tutorial helped you, don’t forget to save it on Pinterest, share it with fellow crocheters, or tag us on social media. Every project you complete brings more beauty and creativity into the world – and that’s something to be proud of. 🧶

Happy hooking – and see you in the next pattern!