Which loop?
When I first started crocheting, I spent a lot of time focusing on inserting my hook under both loops of every stitch, aiming for a neat, uniform fabric. It is a reliable foundation. But eventually, you want to explore how changing your hook’s entry point can alter the drape, stretch, and texture of your work. By shifting where you insert your hook—specifically, working into either the front loop only (FLO) or the back loop only (BLO)—you can completely transform the structure of basic stitches like double crochet without changing the actual stitch mechanics.
Whether you want to add an elastic rib to a sleeve cuff or create flat, decorative ridges for a modern accessory, understanding how these loops behave is key to refining your crochet projects.
The Anatomy of a Crochet Stitch
If you look down at the top of a row of crochet, you will see a series of 'V' shapes. Each 'V' is formed by two distinct strands of yarn:
- The Front Loop: This is the strand closest to you as you work.
- The Back Loop: This is the strand furthest away from you.
Usually, you would slide your hook under both strands. For textured effects, we separate them, working into one and leaving the other untouched to create a visible ridge.
Working into the Back Loop Only (BLO)
Working into the back loop is the most common method for creating a stretchy, ribbed fabric. Because the front loop is left unworked, it remains on the surface, forming a neat, horizontal ridge across the front of your fabric.
To work a BLO stitch:
- Bring your hook over the stitch and insert it directly down through the centre of the 'V'.
- Push the hook under the back loop (the strand furthest from you) only.
- Yarn over and complete the stitch as you normally would.
When you repeat this row after row, the alternating ridges create an elastic ribbing that mimics knitting. This is incredibly useful for sweater cuffs, necklines, or cosy hat brims. The choice of yarn weight will also affect the drape of your ribbing; you can learn more about how different thicknesses behave in our Ultimate Yarn Weight Guide.
Working into the Front Loop Only (FLO)
Working in the front loop only produces a flatter, thinner fabric with more drape. Since the back loop is left untouched, a horizontal line is created on the reverse side of the work. This is ideal for lightweight plant-based accessories where you want movement without the bulk of a heavy rib.
To work a FLO stitch:
- Bring your hook from underneath, pointing up into the centre of the 'V'.
- Slide it under the front loop (the strand closest to you) only.
- Yarn over and complete the stitch as normal.
Because FLO fabric is thinner, it also uses slightly less yarn. If you are working close to the end of your stash and want to avoid losing a close game of yarn chicken, choosing a flatter stitch pattern can be a lifesaver. Read our advice on how to get the most out of your materials in our guide to winning at yarn chicken.
Finding Your Rhythm
When you first attempt FLO or BLO, your muscle memory might make the movements feel a bit awkward. If your hook keeps splitting the yarn, try using a hook with a slightly more pointed tip, which makes sliding into the centre of the 'V' much smoother. Keep your hands relaxed; tension can tighten up when you are learning a new path, but keeping your stitches loose will make inserting the hook much easier on the next row.
If you are ready to practise this technique, you can download our free leg-warmer pattern, which uses alternating loop stitches to create a comfortable, snug fit using soft, plant-based fibres. You can also see how loop shaping is used to build structures in our collaborative project, the free scrunchie bag crochet pattern.
Other posts you might like:
Frequently Asked Questions
Does working in the back loop only make the crochet fabric weaker?
No, but it does make the fabric more elastic and slightly more open. While the individual stitches are secure, the ribbing will stretch more, so it is best suited for garments rather than structural items like bags.
Can I use front and back loop crochet with any stitch?
Yes, you can apply this technique to any standard crochet stitch, including double crochet, half treble, and treble crochet. The taller the stitch, the more pronounced and drapey the resulting texture will be.
How do I prevent my edges from curling when working in BLO?
Edges can sometimes curl if your starting tension is too tight. To prevent this, focus on keeping your turning chains loose, or work the very first and last stitches of each row through both loops to anchor the edges.
What is the difference between BLO and FLO in terms of yarn consumption?
Because FLO fabric is slightly thinner and flatter, it can use marginally less yarn than BLO, which creates denser, thicker ridges. If you are close to running out of yarn, working a flatter stitch pattern can help extend your yardage.