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Joining and seams · Beginner

Magic knot

A magic knot joins the end of one ball of yarn to the start of the next with two small knots. Tie the end of each yarn in a simple knot round the other strand, pull the two long strands apart until the knots slide together, and cut off the short ends. The knot is small enough to hide inside a stitch.

How to work it

  1. Lay the two ends side by side

    Lay the end of the old yarn and the end of the new yarn beside each other, pointing in opposite directions, so that they overlap.

  2. Tie the first knot

    Take the short end of one yarn round the other strand and tie it in a simple knot, so that the knot grips that strand. Pull it tight.

  3. Tie the second knot

    Do the same with the other short end: tie it in a simple knot round the first yarn, a little way along from the first knot. Pull it tight.

  4. Pull the long strands apart

    Two strands of yarn lying side by side: the old yarn comes in from the left and the new yarn, in a second color, from the right. The short end of each is tied in a small knot round the other strand, and the two knots are a little way apart. Arrows show the two long strands being pulled away from each other.

    Take hold of the two long strands, the yarn that leads to your work and the yarn that leads to the new ball, and pull them away from each other. The two knots slide along until they meet and lock against each other.

  5. Tug it

    Give the join a hard tug before you cut anything. If the knots slip or come apart, this yarn does not hold a magic knot: join it another way.

  6. Cut off the short ends

    The same two strands after the pull. The two knots have slid along the strands until they sit tight against each other, and the short end of each has been cut off close to its knot.

    Cut the two short ends close to the knot, taking care not to nick the knot itself. Then go on crocheting.

At a glance

Used for
joining a new ball of the same color when the old one runs out; joining a new color; a join that leaves no ends to weave in
What it is
Two simple knots, each tied round the other strand, pulled together
Ends to weave in
None. The short ends are cut off at the knot.
Where it is used
In the middle of a piece, when a ball runs out. It is also used to change color; then the knot has to fall exactly where the colors change.
Which yarns
Teachers differ. One uses it in any yarn. Another keeps it for yarns with some grip, such as wool and most acrylics, and does not use it in very smooth or shiny yarns, where the knot can work loose.
Before cutting
Pull hard on the join. Try it first on two scraps of the yarn.

Not every maker ties knots at all. The case against them is that a knot makes a hard bump in the fabric and can come undone with time, where ends that are woven in lie smooth. The case for them is that a small knot makes a join feel secure, and some makers tie one for that reason and weave the ends in as well.

The magic knot sits between the two. It is a knot, but a very small one, and it is made to disappear into the stitches. Whether it holds depends on the yarn, so try it on scraps and pull on it before you trust it in a blanket.

The ways of joining that use no knot are on other pages: working the new yarn in at the last step of a stitch, and weaving the ends in afterwards.

When it goes wrong

The knots came apart when I pulled.
The yarn is too smooth to grip, or a knot was not pulled tight before the pull. Tie it again with both knots tight. If it fails again, join this yarn without a knot.
The knot landed in the wrong place for my color change.
The knot has to be tied at the exact point along the yarn where the change falls, and that is hard to judge. The usual way to change color at an exact stitch is to work the new color in at the last step of the stitch before.

Questions

Is a magic knot secure?
It depends on the yarn. Teachers who use it call it a strong join, but one of them does not use it in very smooth or shiny yarns. Pull hard on the join before cutting the ends, and try it on scraps first.
Should I tie knots in crochet?
Makers disagree. Some teachers say not to, because a knot leaves a bump and can come undone, and they weave the ends in. Others tie a small knot for security and weave the ends in too.
Do I weave in the ends of a magic knot?
No. The short ends are cut off close to the knot, and that is the point of it.