Grafting with the kitchener stitch requires a bit of concentration. You want to do this when you know you won't be interrupted.
With the stitches to be grafted on two parallel, double-pointed needles, make sure that the working yarn is coming from the back needle.
To start, take the tapestry needle through the first stitch on the front needle as if to purl and leave the stitch on the needle. Now, go through the first stitch on the back needle as if to knit and leave this stitch on the needle.
Keep the working yarn below the needles. You will now work two stitches on the front needle, followed by two stitches on the back needle, across the row, as follows:
On the front needle, go through the first stitch as if to knit and drop it off the needle. Go through the second stitch as if to purl and leave it on the needle. Tighten the yarn.
On the back needle, go through the first stitch as if to purl and drop it off the needle. Go through the second stitch as if to knit and leave it on the needle. Tighten the yarn.
When there is only one stitch on each needle, go through the front stitch as if to knit and drop it off the needle. Go through the back stitch as if to purl and drop it off the needle. Pull the tail to the inside and weave in.
