If you want a nicely finished edge – or to make less obvious joins when working in rounds and changing colours – this is the joining technique you will want to try.
Invisible Finish / Invisible Join Technique
Step 1: After you complete the last stitch of the round, cut the yarn (leaving a 6″ – 8″ tail). Then with your hook, pull up on the last loop on your hook until the end pulls all the way through.
Step 2: Thread your yarn through a yarn needle. Insert your needle under both loops of the stitch, 2 stitches to the left of your last worked stitch.
Step 3: Pull through
Step 4: Insert the needle in between the 2 loops of the last stitch crocheted.
Step 5: Pull through.
See how the stitch now looks like all the others?
It has replaced the one it was worked over top of – so if you were to work another round – you would actually work into this stitch, not the one it is hiding.
Step 6: weave in all ends