How to Make Half Double Crochet
The half double crochet, written as hdc in patterns, sits between single crochet and double crochet in height and in effort. In this article you learn the three movements the Craft Yarn Council teaches, why the stitch finishes with one draw through three loops, and how to read the turning chain so your stitch count holds from row to row.
Why the stitch starts with a yarn over
Single crochet begins by pushing the hook into the fabric with nothing wrapped on it. Half double crochet reverses that order. You yarn over first, meaning you wrap the yarn around the hook from back to front before the hook touches the work, and only then insert the hook into the stitch the pattern indicates. That first wrap is what gives the stitch its extra height: more yarn carried into the stitch means more yarn standing in it when the stitch is finished.
The Craft Yarn Council's instruction sheet for the stitch describes the whole thing in one line of abbreviations: yarn over, insert the hook in the stitch indicated, yarn over and pull up a loop, then yarn over and draw through all three loops on the hook. The figures on that sheet show each of those moments, and the official instruction sheet is short enough to keep open beside you on a first attempt.
What happens with three loops on the hook?
Count the loops on your hook as you work and the stitch explains itself. After the yarn over and the pull up, you have three loops sitting on the hook: one from the opening yarn over, one that was already there, and the new loop you just pulled through the fabric. Single crochet closes in two stages, drawing through two loops, then through two again. Half double crochet closes everything in a single motion, one yarn over and then a draw through all three loops at once. That single closing is what tightens the stitch into a dense, solid fabric rather than the slightly louvered surface a double crochet produces.
The instructor manual the Craft Yarn Council publishes for its crochet program calls the half double crochet a versatile stitch that is quick to do and makes a good solid fabric. In practice that means pieces worked in hdc keep their shape and block less open air than laceier stitches, which is one reason it appears so often in hats, blankets, and other warm objects.
Where does the first stitch of the row go?
Beginners lose count at the edge, not in the middle, so the turning chain deserves precise attention. In the Council's program manual, you start the first row by yarning over and inserting the hook into the third chain from the hook. Each following stitch goes into the next chain, one per chain, all the way across. At the end of the row you chain two and turn. Those two chains stand in for the first half double crochet of the new row.
On the second and every later row, the Council's convention is explicit. The first stitch is worked into the first half double crochet of the row below, and the last stitch is worked into the last half double crochet of the previous row, ignoring the turning chain entirely. Work into the turning chain by accident and your row grows by one stitch; skip the first real stitch by accident and it shrinks. Either way the edge drifts wider or narrower, row after row, and the piece stops being the rectangle you intended. If your stitch terms are new, the glossary on basic stitch definitions covers the abbreviations used here.
When do patterns treat hdc differently?
The Council's manual adds a note worth reading twice: unless told otherwise, hdc patterns expect you to complete the stitches exactly as described above. However, it is not unusual for patterns to treat the half double crochet like a double crochet, working into the turning chain and skipping the first stitch of the row. When a pattern takes that route, it says so clearly at the start. So the rule is simple: trust the default until the pattern tells you otherwise, and when it does tell you, follow that instruction from the first row to the last. Mixing the two conventions inside one piece produces uneven edges that no blocking fixes.
How does the manual's practice square work?
The instructor manual includes a test sample for the stitch, and walking through it shows how the counting fits together. This is the manual's exercise, presented here as it appears there, not a fresh sample. With an H, 5 mm hook and medium-weight yarn, chain 14. Row 1: work a half double crochet in the third stitch from the hook, then one in each chain to the end, chain two and turn, which leaves 12 stitches. Row 2: work a half double crochet in each stitch to the end of the row. Repeat Row 2 until a square forms, then fasten off.
Notice the arithmetic. Fourteen chains, minus the two that serve as the first stitch, leaves twelve worked stitches, and twelve is the number you should count at the end of every row after that. The manual does not state a finished size or a gauge target for the sample, only the instruction to repeat until the piece is square, so the number of rows is whatever your own tension produces. That is a fair introduction to the idea that counting matters more than measurement at this stage; when you move on to real patterns, checking your swatch first becomes essential, and the page on gauge and gauge swatches explains that step.
Practicing the three-loop close
If the three-loop draw through feels clumsy at first, that is normal, because most beginners arrive at hdc from single crochet, where the hook never holds three loops at once. Chain a short length of fifteen or so chains, work one row of half double crochet with the yarn over first, and stop midway through a stitch to look at the three loops before closing them. Naming what you see, one loop from the yarn over, one loop from the pull up, and the loop that was already on the hook, makes the movement deliberate instead of memorized. Then work the manual's twelve-stitch square from edge to edge, counting each row, and treat the first and last stitch of every row as the two places where the real test happens.
The Stitch Ledger editorial team, contact@crochet1-2-3.com