How to graft two pieces of knitting together

How to graft two pieces of knitting together

Knitting is a popular craft that allows you to create beautiful and unique garments. However, once you have finished knitting two separate pieces, you will need to join them together to create a finished project. This process, known as seaming, can seem daunting for beginners, but with the right techniques, it can be easily mastered.

There are several different methods for seaming knitting, but in this step-by-step guide, we will focus on the most common technique, known as mattress stitching. This method creates an invisible seam that seamlessly joins the two pieces together, giving your finished project a professional and polished look.

Before you begin seaming, it’s important to make sure that your two pieces of knitting are blocked and have the same dimensions. This will ensure that the finished project has a consistent shape and size. Once your pieces are ready, you can start the seaming process.

To seam using the mattress stitch, start by placing the two pieces of knitting side by side, with the wrong sides facing outwards. Thread a tapestry needle with a length of yarn that is approximately three times the length of the seam you will be stitching. Insert the needle under the first horizontal bar on the side of the knitting closest to you, and then insert it under the corresponding bar on the other piece. Continue this process, working your way up the seam, taking care to keep your stitches even and consistent.

Gather Your Materials

Before you begin seaming two pieces of knitting together, make sure you have all the necessary materials. Having everything you need on hand will help ensure a smooth and efficient process. Here are the materials you will need:

  • Yarn: Choose a yarn that matches the yarn used in your knitted pieces. It’s important that the yarn colors and texture match to create a seamless look.
  • Tapestry needle: A tapestry needle will be used to weave the yarn through the stitches, joining the pieces together.
  • Scissors: You will need a pair of scissors to cut the yarn after you finish seaming.
  • Pins: Pins can be helpful for positioning the knitted pieces before you start seaming. They will keep the pieces in place and prevent any shifting.
  • Blocking materials (optional): If your knitted pieces require blocking before seaming, gather the necessary materials, such as a blocking mat, pins, and a spray bottle.

Once you have gathered all these materials, you will be ready to start seaming your knitting together. Having everything in one place will make the process much smoother and more enjoyable.

Prepare the Edges

Before you can start seaming your knitting pieces together, it’s important to prepare the edges. This involves a few key steps:

  1. Block your knitting: Blocking your knitting helps to even out the stitches and make the seaming process easier. Soak your knitting in lukewarm water, gently squeeze out the excess water, and lay it flat on a clean towel. Shape the knitting to the desired measurements and let it dry completely.
  2. Weave in loose ends: Take the time to weave in any loose ends from your knitting. Use a tapestry needle and weave the yarn through several stitches on the wrong side of the fabric. Trim any excess yarn close to the fabric to ensure a neater finish.
  3. Match the stitch patterns: If you’re seaming two pieces with different stitch patterns or stitch counts, it’s important to match them up before sewing. Count the number of stitches in each pattern repeat and make sure they align properly when placing the pieces together.
  4. Use stitch markers: On both pieces of knitting, place stitch markers at regular intervals along the edges you’ll be seaming. This will help you keep track of your progress and ensure an even seam.

By properly preparing the edges of your knitting, you’ll set yourself up for success when it comes time to seam the pieces together. Take the time to block, weave in ends, match stitch patterns, and use stitch markers for a professional-looking finish.

Choose a Suitable Seaming Method

When it comes to seaming two pieces of knitting together, there are several methods you can choose from. The method you choose will depend on the type of project you are working on, the type of stitch pattern you are using, and the desired outcome of your finished piece. Here are some popular seaming methods to consider:

  • Mattress Stitch: This is a common seaming method used to join vertical seams, such as side seams on a sweater or shoulder seams. It creates an invisible seam on the right side of the work.
  • Whip Stitch: This method is often used to join horizontal seams, such as when seaming the top and bottom of a hat. It creates a visible seam on the right side of the work.
  • Backstitch: Backstitch is a sturdy seaming method that can be used for joining both vertical and horizontal seams. It creates a visible seam on the right side of the work.
  • Overcast Stitch: This method is commonly used to join the edges of ribbed or garter stitch fabric. It creates a visible seam that adds texture to the finished piece.

It’s important to choose a seaming method that suits your project and the look you want to achieve. Some methods may be better for joining delicate or lacy fabrics, while others may be better for creating a more structured and sturdy seam. Experiment with different methods to find what works best for you and your knitting project.

Regardless of the seaming method you choose, it’s always a good idea to practice on a swatch or scrap yarn before seaming your actual project. This will give you a chance to familiarize yourself with the method and make any necessary adjustments before working on your finished piece.

Remember, the seaming method you choose can greatly impact the final appearance and durability of your knitted item. Choose wisely and take your time to ensure a professional-looking finished result.

Start the Seam

Once you have your two pieces of knitting that you’re ready to seam together, the first step is to gather your supplies. You will need a blunt-tipped tapestry needle and a length of yarn in the same color as your knitting.

Before you begin the actual seaming process, it’s helpful to lay your pieces flat on a table or other flat surface and compare them. Make sure the lengths match up and that any stitch patterns or details align properly. This step will help ensure that your seam looks neat and professional.

Next, thread your tapestry needle with a length of yarn that is about twice as long as the seam you need to sew. This will give you enough yarn to easily work with as you seam. Make a knot at the end of the yarn, leaving a small tail.

Now, line up the edges of the two pieces of knitting that you want to seam together. Hold them together with the right sides facing each other. This means that the side of the knitting that will be visible on the finished garment should be on the inside.

Starting at the bottom or one side of the pieces, insert your tapestry needle through the first stitch on both pieces, from back to front. Pull the yarn through, leaving a small tail on the back side of the knitting.

Now, insert the needle through the next stitch on both pieces, from front to back. Pull the yarn through, creating a small loop of yarn on the front side of the knitting.

Continue in this manner, alternating between front to back and back to front, working your way up the seam. Be sure to keep your tension even, neither too loose nor too tight, to ensure that your seam looks neat and doesn’t pucker.

When you reach the end of the seam, insert your needle through the last stitch on both pieces, from back to front. Pull the yarn through, leaving a small tail on the back side of the knitting.

To secure the seam in place, weave in the loose ends by threading your needle through the nearby stitches several times. Trim any excess yarn.

Now you’re ready to move on to the next step in your knitting project! Whether you’re joining pieces for a sweater, hat, or other garment, mastering the art of seaming will help take your knitting skills to the next level.

Continue Seam Along the Length

Once you have successfully joined the beginning and end of your knitting, it’s time to continue seaming along the length of your project. Follow the steps below to seamlessly connect the two pieces together.

  1. Prepare your working yarn: Cut the yarn leaving a tail that is at least 6 inches long. Thread this tail onto a yarn needle.
  2. Align the edges: Place your knitting pieces flat on a surface, ensuring that the edges you want to seam are aligned evenly.
  3. Insert the needle: Starting from the lower edge, insert the needle through the center of the first stitch on one side and then through the center of the corresponding stitch on the other side. Pull the yarn through, leaving a small loop to secure it.
  4. Repeat the stitching: Move up to the next pair of stitches and repeat the previous step. Continue this process all the way up the length of your knitting, ensuring that your stitches are even and secure.
  5. Weave in the ends: Once you have reached the top of your knitting, secure the seam by weaving in the remaining yarn tail. This can be done by threading the tail through the stitches on the wrong side of your work.
  6. Finishing touches: Trim any excess yarn and make sure that your seam is neat and tidy. If desired, block your project according to the instructions provided in the pattern or as desired.

Congratulations! You have successfully seamed two pieces of knitting together along the length. This technique can be used for a variety of projects, such as scarves, blankets, and sweaters. With practice, your seams will become seamless and nearly invisible.

Secure the Seam

After you have finished sewing the seam, it is important to secure it to ensure that it does not come undone. There are several ways you can secure a seam, depending on the type of knitting and the desired finished look.

Weaving in Ends

One common method to secure a seam is by weaving in the loose ends. Using a tapestry needle, thread the loose end through the stitches of the seam, going back and forth in a zigzag pattern. This will help anchor the seam and prevent it from unraveling. Once you have woven in the ends, trim the excess yarn close to the fabric to neatly finish the seam.


Another option to secure the seam is by whipstitching along the edge. To do this, align the two pieces of knitting with the right sides facing out. Thread a tapestry needle with matching yarn and begin stitching through both layers, starting at the edge and going in a diagonal or vertical direction. Continue whipstitching until you reach the end of the seam, making sure to pull the yarn tight to keep the seam secure. Knot the yarn at the end and weave in any loose ends.

Overcast Stitch

The overcast stitch is a good option for securing edges that may stretch or fray easily. Start by aligning the edges of the knitting with the right sides facing out. Thread a tapestry needle with yarn that matches the knitting and insert the needle from back to front through both layers, leaving a small loop of yarn. Then, insert the needle through the loop and pull it tight. Repeat this process, spacing the stitches evenly along the seam, until you reach the end. Knot the yarn at the end and weave in any loose ends.

Kitchener Stitch

If you are seaming together two pieces of live stitches, such as the toes of a sock, you can use the Kitchener stitch to create an invisible and seamless seam. The Kitchener stitch involves threading a tapestry needle with yarn and working in a specific pattern that mimics the knitted stitches. This technique is best learned through visual or hands-on instruction, so it is recommended to follow a tutorial or watch a video to master the Kitchener stitch.

By following these methods to secure the seam, you can create a professional-looking finish for your knitted project. Experiment with different techniques to find the one that works best for your specific knitting and desired outcome.

Repeat for the Other Pieces

If you have more than two pieces of knitting to seam together, you’ll need to repeat the same process for each additional piece. Follow the steps outlined above for each piece, ensuring that you align the edges properly and use the appropriate method for securing the seams.

Take your time to check the measurements and adjust any discrepancies before you start the seaming process. It’s important to have all your pieces properly aligned to create a clean and seamless finish.

As you work on seaming the other pieces, make sure to maintain consistency in your stitching. This will help create a unified look and ensure that all the seams look the same.

You may find it helpful to lay out all the pieces side by side before starting the seaming process. This can give you a better visual of how the finished project will look and help you ensure that all the pieces are in the correct order and orientation.

Continue following the same steps for each piece until all the pieces are successfully seamed together. Once you’re finished, take a step back and admire your handiwork!

Finish and Adjust the Seam

After you have completed seaming the two pieces of knitting together, you may need to make some adjustments to ensure that the seam is even and secure. Here are some steps to help you finish and adjust the seam:

  1. Check the tension: Before finalizing the seam, check the tension on both sides of the seam to ensure that they are even. Adjust the tension if necessary by applying gentle pressure to either side of the seam to even it out.
  2. Weave in the ends: Use a tapestry needle to weave in any loose ends or yarn tails that may be left from the seaming process. This will help secure the seam and prevent it from coming undone.
  3. Block the seam: Blocking the seam can help smooth out any uneven stitches and create a neater appearance. You can do this by lightly wetting the seam and then laying it flat to dry, making sure to reshape the seam as desired.
  4. Test the strength of the seam: Gently tug on the seamed area to test the strength of the seam. If it feels weak or pulls apart easily, you may need to reinforce the seam by adding more stitches or using a stronger seaming technique.
  5. Make adjustments if necessary: If the seam does not line up correctly or if it looks uneven, you may need to undo the seam and rework it. Carefully remove the stitches and start again, making any necessary adjustments to ensure a clean and even seam.

By following these steps, you can finish and adjust the seam on your knitted pieces to create a professional-looking finish. Remember to take your time and carefully check your work to ensure a seamless and secure seam.


What is the best way to seam two pieces of knitting together?

The best way to seam two pieces of knitting together is to use a technique called mattress stitch. This method creates an invisible seam that is nearly seamless.

Can I use a different stitch to seam two pieces of knitting together?

While mattress stitch is the most common method, you can also use other stitches such as whip stitch or back stitch. However, these stitches may not create as seamless of a seam as mattress stitch.

What materials do I need to seam two pieces of knitting together?

To seam two pieces of knitting together, you will need a darning needle, which is a large needle with a blunt tip, and a length of the same yarn used to knit the pieces.

Should I block the pieces before seaming them together?

It is recommended to block the pieces before seaming them together. Blocking helps even out any tension differences and ensures that the pieces will line up properly when seamed.

Are there any tips for making the seam as invisible as possible?

One tip for making the seam as invisible as possible is to insert the needle under both legs of the stitch at the edge of each piece. This helps to create a smooth, seamless join.


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