Hidden ends tutorial.http://pandacrochet.8m.com/hidden_ends.htm
There is more than one way to end a row of a granny
You can slip stitch over to the corner.
Slip stitch on top of the the stitches to you
get to the corner and start your next row.
You can start by doing just 3 double crochets
in the corner. When you get back to that corner,
do the last 3 double crochets.
If you do a chain 2 in the corner,
do this instead: Ch 1 and single crochet to the top of
the chain 3. Then Chain 3 and 2 double crochet onto the
single crochet that you just made.
When you get back to that corner, just do 3 double crochets,
chain 1 and single crochet to the top of the first chain 3.
When you want to end that color and move on to another
color, just do a chain 2 and attach it to the top of the
chain 3 instead of the chain 1 and single crochet.
Next, join your new color in the middle of the corner,
chain 3 and do 2 double crochets in that corner and work
If you do a chain 3 in the corners,
do this: Chain 1 and do a double crochet to the top
of the chain 3.
This will also bring you to the middle of the corner
and do the chain 3 and attach it to the chain 3
at the beginning of the row when you want to end that
color or end the granny square.
All your chain 3's will be in the corners and they won't
move across the granny square.
This works well for solid granny squares also.
Panda Man's invisible joining method,
can be used, when joining the chain 2 or chain 3 to the
first stitch at the end of a row, when you you finish
your granny square in the corner.
This is neater than a slip stitch.
You should also leave about a 6 inch tail to weave in at
the start of the square, at the end of the square and when
ever you change colors. Even do this if you use a slip sititch
to finish the square. The yarn can come undone
and your square will fall apart with use or washing.