How to Knit a Picot Hem on a Cast On Edge
Few finishing techniques in knitting are as quietly elegant as the picot hem. It sits at the edge of your work like a row of tiny pearl beads, simultaneously decorative and functional, giving your project a polished, professional look that you’d expect to find on hand-knitted heirlooms or high-end boutique pieces. Whether you’re working on a sweater hem, a baby blanket border, a hat brim, or a pair of mittens, learning how to knit a picot hem on a cast on edge is one of those skills that will transform the way your finished objects look and feel.
This guide walks you through everything you need to know: what a picot hem is, why knitters love it, what materials and skills you’ll need before you start, and a detailed, step-by-step tutorial you can follow at any skill level. By the end, you’ll feel completely confident adding this beautiful detail to your next project.
What Is a Picot Hem?
A picot hem is a folded hem that creates a delicate zigzag edge made up of tiny points, called picots. It’s created by working a folding row (sometimes called a turning row or fold line) that uses yarn-over increases paired with decreases to form evenly spaced holes. When you fold the fabric along that row and stitch it down, the holes become the points you see along the finished edge.
The word “picot” comes from French and refers to these small loops or points. The technique has been used in lace knitting, embroidery, and crochet for centuries, and it remains one of the most beloved decorative edges in contemporary knitting patterns as well.
What makes a picot hem different from a simple folded hem is that the fold line itself becomes a design element. Rather than hiding the hem neatly inside the fabric, the picot hem brings the fold line to the forefront, making it the star of the show. The tiny points peek out just beyond the edge of the fabric, creating a dainty, finished look without any additional sewing, beading, or embellishment.
Why Knit a Picot Hem on a Cast On Edge?
When a pattern calls for a clean, decorative lower edge, a picot hem on the cast on edge is one of the most satisfying choices available. Here’s why knitters reach for this technique again and again.
It hides the cast on edge completely. No matter how neatly you cast on, the very bottom row of your knitting rarely looks as polished as you’d like. A picot hem solves this problem by folding that edge to the inside of the work, leaving only the beautiful picot points visible from the right side.
It creates a neat, stable hem. When you fold and stitch the hem in place, you create a double layer of fabric at the bottom of your piece. This adds weight and structure, which helps hems hang beautifully and lie flat without rolling. For garments especially, this makes a significant difference in how the finished piece drapes and wears.
It works beautifully in fine and medium-weight yarns. Picot hems are at their most elegant in smoother yarns where the stitch definition is clear. Fingering weight, sport weight, and DK weight yarns all show the tiny picot points crisp and clear. Heavier yarns can work too, but the picots will be more pronounced and the folded hem will add more visible bulk.
It suits a wide range of projects. Sweater hems, sleeve cuffs, baby garments, socks, hats, pillow covers, lightweight blanket edges — the picot hem adapts beautifully to almost any flat or circular project where you want a refined cast on edge.
What You’ll Need Before You Begin
Before diving into the step-by-step tutorial, it helps to gather your materials and review the skills involved.
Materials:
You’ll need your yarn and the needle size recommended for that yarn, though you may want to cast on with a needle one size smaller than your main needles. Using a slightly smaller needle for the cast on and the first section of the hem creates a tighter, neater edge that looks cleaner once the hem is folded and sewn down.
You’ll also want a tapestry needle or blunt darning needle for sewing the hem to the wrong side of the work at the end. A few locking stitch markers can also be helpful for keeping track of your picot spacing while you work the fold row.
Skills You Should Already Know:
You should be comfortable with a long-tail cast on or cable cast on, as these both produce a sturdy, even edge that works well for hems. You’ll also need to know how to knit and purl, work a yarn over (YO), and work a k2tog decrease. These are all basic techniques that any knitter who has completed a beginner project will already have in their toolkit.
Knowing how to pick up live stitches or mattress stitch is helpful for sewing the hem down at the end, though this guide will explain the finishing process in detail.
Understanding the Structure of a Picot Hem
Before you cast on a single stitch, it helps to visualize the structure of what you’re building. A picot hem worked on a cast on edge has three distinct sections.
The first section is the facing, also called the hem allowance. This is the fabric that will eventually fold to the inside of your work. It’s worked in stockinette stitch (or sometimes in a finer needle to create a slightly smaller piece of fabric so it doesn’t bulk out on the inside). This section is usually the same depth as your finished hem will be — somewhere between half an inch and an inch and a half, depending on your project.
The second section is the fold row, also called the turning row or picot row. This is the single decorative row that creates both the fold line and the picot points. It’s worked with alternating yarn overs and decreases, and it’s the defining feature of the entire technique.
The third section is the main fabric, the body of your project that continues from the fold row upward. Once this section is long enough to give you room to work, you’ll fold the facing to the inside and stitch it down, completing the hem.
Step-by-Step: How to Knit a Picot Hem on a Cast On Edge
Step 1: Cast On Your Stitches
Using your preferred cast on method and a needle one size smaller than your main project needle (optional but recommended for a neater finish), cast on the number of stitches your pattern calls for. For a picot hem, your stitch count should ideally be an odd number, because the fold row works best across an odd count. If your pattern calls for an even number, you may need to add one stitch temporarily for the fold row and then decrease it back on the following row.
If you’re practicing this technique on a swatch, cast on 25 stitches as a starting point.
Step 2: Work the Facing
Beginning with a wrong-side row, work in stockinette stitch for the depth of your hem facing. As mentioned, this is typically between half an inch and an inch and a half, depending on the project. For a sweater with a standard hem, one inch of facing is a good rule of thumb. For something delicate like a baby garment, half an inch is usually enough.
For a practice swatch on 25 stitches, work 8 rows in stockinette stitch (starting with a purl row on the wrong side), bringing you to a right-side row ready to work.
Step 3: Work the Picot Fold Row
This is the heart of the technique. With the right side of your work facing you, you’ll work the fold row as follows:
K1, then repeat [yarn over, k2tog] to the last 0 stitches (or adjust for your stitch count as needed).
More specifically, for an odd number of stitches, the fold row goes like this:
K1, YO, k2tog; repeat from to the last 0 stitches, ending with the k2tog on the last two stitches.
Let’s walk through this slowly. You knit the first stitch. Then you bring the yarn over the right needle to create a yarn over, which adds a stitch. Then you knit the next two stitches together, which removes a stitch. The stitch count stays the same because every yarn over is immediately followed by a k2tog. You continue this pattern across the entire row.
When you’re done with the fold row, your work will look like a series of small holes evenly spaced across that single row. These holes are your picots-in-progress.
Step 4: Continue Working the Main Body
Switch to your main needle size if you used a smaller needle for the facing. Beginning with a wrong-side (purl) row, continue working in stockinette stitch or whatever stitch pattern your project calls for. Work at least the same depth as your facing — so if your facing was one inch deep, work the main body for at least one inch before you stop to sew the hem.
For a practice swatch, work another 8 rows in stockinette stitch, bringing the main body to the same depth as the facing.
Step 5: Fold and Pin the Hem
With the right side of your work facing you, fold the facing to the inside along the picot fold row. The fold will happen naturally along that row of holes. Gently press the fold with your fingers to crease it. The picot points will appear along the folded edge, peeking just beyond the bottom of the fabric.
Pin the hem in place if you like, making sure the fold is even all the way across. Some knitters prefer to press the folded hem lightly with a damp cloth and warm iron at this stage to help it lie flat before sewing.
Step 6: Sew the Hem Down
Thread a tapestry needle with a length of the same yarn used for your project (or a finer matching yarn if your main yarn is bulky). You’ll now stitch the live edge of the facing to the wrong side of your main fabric.
Hold your work with the wrong side facing you. You should see the folded hem lying against the back of the fabric. Using a whip stitch or a slip stitch, catch one stitch from the live edge of the facing (the cast on edge, or the last row of your facing before the fold row) and then catch one stitch from the back of the main fabric. Work across the row, catching one stitch at a time, keeping your tension even and relaxed. You do not want to pull the stitches tight, as this will create a visible ridge on the right side of the fabric and prevent the hem from stretching comfortably.
Some knitters prefer to leave the facing stitches on the needle rather than letting them go live, using a technique called a three-needle bind off or simply catching each stitch directly from the needle. This method is especially clean because it prevents any risk of dropped stitches while you sew.
Work all the way across the row until the entire facing is stitched down. Fasten off the tail securely on the wrong side.
Tips for a Beautiful Picot Hem Every Time
Keep the fold row consistent. The most common issue with picot hems is an uneven fold row — some picots larger than others, or the holes looking inconsistent. This usually happens when yarn-overs are worked at different tensions. Slowing down on the fold row and being deliberate with each yarn over will make a noticeable difference.
Sew the hem loosely. This is worth repeating because it’s the single most common mistake when finishing a picot hem. If you stitch the hem down too tightly, you’ll create a hard ridge on the right side and the hem won’t have any give. Use a relaxed tension that mirrors the tension of the knitting itself.
Use a finer yarn for sewing on bulkier projects. If you’re working with a worsted or chunky yarn, the hem will be thick when folded double. Using a finer yarn in a matching color to sew the hem down reduces bulk significantly and gives you more control over the placement of your stitches.
Try it in the round. A picot hem works beautifully in circular knitting as well. For a circular project, the facing is worked in stockinette (knit every round), the fold row is worked exactly the same way, and the body continues above it. Sewing the facing down in the round follows the same principle — catch each facing stitch and each main body stitch in turn, working around the full circumference.
Experiment with picot spacing. The classic picot fold row uses k2tog paired with a yarn over every two stitches, but you can space your picots differently for a different look. Working [YO, k2tog, k2] every four stitches creates wider, more spaced-out picots with a slightly different character. Tighter spacing creates a more densely pointed edge. Swatching is the best way to find the spacing you love.
Common Problems and How to Fix Them
The picots are barely visible after folding. This usually means the fold row holes are too small. Try working the yarn overs slightly looser, or use a needle one size larger just for the fold row. The holes need to be open enough to create clearly defined picot points when folded.
The hem won’t lie flat. An uneven tension between the facing and the main body is usually the culprit. If the facing is worked more tightly than the main body, it will pull and cause the hem to cup. Try blocking the folded hem with steam before sewing it down.
Stitches are coming undone while I sew. If your facing stitches are live and slipping off the needle, thread them onto a piece of waste yarn or a spare needle to keep them secure while you work. You can sew directly from the spare needle, catching each stitch as you go.
The sewn hem shows on the right side. This is a tension issue — the sewing yarn is being pulled too snugly, dragging the main fabric inward. Remove the sewing yarn, re-block the hem, and redo the sewing with a more relaxed hand.
Putting It All Together
A picot hem on a cast on edge is one of those knitting techniques that feels more complicated than it actually is. Once you’ve worked through the three-part structure — facing, fold row, main body — and sewn your first hem down, the process becomes intuitive. The fold row is the only part that requires close attention; everything else is straightforward stockinette and a bit of finishing.
What you gain from learning this technique is a beautiful, professional edge that transforms ordinary cast ons into something genuinely lovely. The tiny picot points carry a long history behind them — centuries of lace makers and knitters reaching for exactly this detail when they wanted their work to feel considered, refined, and made with care.
The next time you start a new project and find yourself reaching for a plain knit-and-purl hem, consider giving the picot hem a try instead. Cast on, work your facing, enjoy the satisfaction of the fold row, and sew that hem down with a relaxed, steady hand. You might find, as so many knitters do, that it quickly becomes your favorite cast on edge of all.
