Half double crochet is a fun quick stitch. It’s slightly taller than single crochet and just as easy. Once you learn it, you’ll be flying through your projects.
It's abbreviation in patterns is hdc. ( UK is htr – half treble crochet.)
Let’s start right off making a swatch.
1 – Chain 22 (2 are for a turning chain.)
2 – yo, insert your hook into the third chain from the hook.
3 - yo again and pull loop up. You should still have 3 loops on your hook.
4 – yo a third time and pull through all 3 loops.
That is your first complete stitch.
5 – Continue hdc to the end of your foundation chain. 20 stitches.
6 – Chain 2 (turning chain) and turn your work.
7 – Repeat steps 2-6, 11 times. You will have completed 12 rows.
You’ve completed your first swatch.
Keep practicing. Make another swatch, but vary your row length this time, or try using more than one color of yarn. Be sure to practice turns as well. The more you practice the quicker it will become second nature to you.
Try a pattern or two with this new stitch. Once you're confident with it, leave Half Double Crochet and move on to Double Crochet.