Double Crochet Post Ribbing
Starting in the 4th chain from the hook, work 1 DC. 1 DC into each chain. CH 2 and turn.
Starting with the 2nd post, *work 1 DC around the post by YO and inserting hook from front to back and back to front then complete the DC. (The post pops forward: Front Post DC.) Work 1 DC around next post by YO, inserting hook from back to front and front to back then complete the DC. (Post pops to the back: Back Post DC.) Repeat from * across the row, ending with the last DC worked around the turning chain. CH 2 and turn.
Starting with the 2nd post, *work 1 Front Post DC around the post, then 1 Back Post DC around the next post. Repeat from * to the end of the row, ending with the last DC worked under the turning chain. CH 2 and turn.
REPEAT ROW 3
See video tutorial below.