Okay I read below all the tips on curling with stockingette stitch K/P
How do I add stitches around a finished scarf to stop the curling?
Do I crochet stitches around in SC maybe or can one knit garter stitches around the completed scarf that was knit up on 22 stitches to a greater length? How do you knit on the side of a scarf? How many rows of added stitches do the trick? Thanks in advance for your advice. 
Lynn
Curling and adding stitches to the sides
waiting to hear how to add to side of scarf (to stop curling) after done.
want to add the garter stitiches. No idea how to pick this up with a knitting needle. Can see how to use crochet hook maybe to add stitches, but how do you do it with a knitting needle?
THANK YOU JESSI This pick up video was exactly what I needed. I think I can do it now. thanks so much for responding so quickly to my need! Off to Michael’s for more yarn to finish this scarf and stop the Curling! Yippee! :XX: Lynn