When crocheting squares and rounds and hexagons, like the African Flower,
there are several ways to make a colour change on a new round.
Here is how I do it.
You have made the last chain stitch of the first row of an African Flower.
Now cut the yarn.
Pull the yarn through the chain stitch.
Insert the hook at the top of the first dc on row one.
Get the loose end with the hook.
Pull the yarn through.
Insert the hook from below in the last chain stitch of the round and get the yarn.
Pull the yarn through to the back.
Now your crochet piece will look like this.
The joining between the first dc and the last chain stitch of round one
is almost invisible, looking same as all the other stitches.
Now insert the hook at the joining point and get the new yarn.
Pull the yarn through to make the first loop.
Get the yarn again with the hook to make the first chain stitch,
and make sure the loose end of the yarn is above the hook.
Pull the yarn through and your first chain stitch is made.
Notice how the loose end is above the yarn and behind the stitch.
Now when you make the second chain stitch the loose end gets locked
between the two stitches. Make the third chain stitch.
Continue with the dc and make sure both the loose ends lay flat against
the crochet piece and make the dc’s around the loose ends.
When you made three groups of dc’s your piece will look like this from
the back side. The loose ends are locked by the dc's.
Cut both the loose ends off and continue crocheting.