How to Block Knitting and Crochet: A Beginner’s Guide
You’ve finished your project, woven in the ends, and admired your stitches… but there’s one final step that can completely transform the finished result: blocking.
My mother was a prolific knitter many years ago when I was growing up. Aside from only ever knitting on straight needles (circular needles weren’t really a thing back then), she never blocked her finished work.
It wasn’t until years later that I realised just how much of a difference blocking can make to the finished look, feel and drape of a project.
Even today, you’d be surprised how many customers come into the shop who have never heard of blocking. We’ve had many a blank look over the years when asking customers if they block their knitting after finishing!
Blocking helps smooth stitches, improve drape, shape garments, and bring out the best in lacework and textured patterns. Whether you knit or crochet, learning how to block your finished projects is one of the easiest ways to make handmade items look more polished and professional.
In this beginner-friendly guide, we’ll explain what blocking is, the different blocking methods, and when to use each one.
What Is Blocking?
Blocking is the process of shaping and setting your finished knitting or crochet after washing or dampening it (more on the different methods later).
It can help:
- Even out stitches
- Relax the fabric
- Improve drape
- Open up lace patterns
- Flatten curling edges
- Shape garments to the correct size
- Give finished projects a more professional appearance
Many natural fibres respond beautifully to blocking, especially wool, merino, alpaca, cashmere, silk, and blends containing these fibres.
Does Every Project Need Blocking?
Not always, but most projects benefit from it in some way.
In the shop, we often joke that “blocking hides a multitude of sins” and there’s definitely some truth in that!
Blocking can help even out tension, smooth slightly uneven stitches, improve drape, and generally make a finished project look far more polished and professional.
Projects that especially benefit from blocking:
- Lace shawls
- Garments
- Crochet blankets
- Scarves and wraps
- Colourwork projects (I’ve found this especially beneficial when doing stranded colourwork, where tension can sometimes become tight)
- Finished socks
- Anything with textured stitches
Projects that may only need light blocking:
- Simple hats
- Ribbed accessories
- Structured items with little drape
- Socks knit with high nylon content
Even a gentle wash and reshape can make a noticeable difference.
Wet Blocking
Wet blocking is the most common blocking method and works beautifully for most wool and natural fibre projects.
How to Wet Block
- Fill a basin or sink (we use a washing up bowl) with lukewarm water
- Add a small amount of wool wash such as Eucalan or Yarn Food
- Soak your project for around 15–30 minutes
- Carefully lift it out and gently squeeze excess water out
(Never wring or twist the fabric) - Roll the project inside a towel and press gently
- Lay flat and shape to the desired measurements
- Pin if needed
- Leave to dry completely
Steam Blocking
Steam blocking uses steam to dampen rather than soak the entire project.
This method is useful for:
- Quick reshaping
- Acrylic yarns
- Light finishing
- Projects that don’t need aggressive stretching
How to Steam Block
- Lay the project flat
- Pin into shape if necessary
- Hover a steam iron (or clothes steamer) above the fabric
(Do not press the iron onto the knitting or crochet) - Allow the steam to penetrate the fibres
- Leave untouched until cool and dry
Important:
Be especially careful with acrylic yarns. Too much heat can permanently flatten or damage the fibres.
Spray Blocking
Spray blocking with a dedicated blocking spray is a gentler method often used for delicate items or small adjustments.
Simply:
- Pin the project into shape
- Mist lightly with the blocking spray
- Leave to dry naturally
This can work well for lightweight shawls and projects that only need minimal shaping.
What Products Can You Use for Blocking?
Using a gentle wool wash can help keep fibres soft and fresh while blocking.
Popular options include:
These no-rinse washes are ideal for hand-dyed yarns and delicate fibres.
You can also use:
- Blocking mats
- Rust-resistant pins
- Sock blockers
- T-pins
- Blocking wires for lace shawls
Common Blocking Mistakes
Hanging wet garments
Heavy wet fibres can stretch out of shape. Always dry flat.
Wringing projects
Twisting the fabric can damage fibres and distort stitches.
Overstretching lace
Aggressive blocking can alter the finished shape too much.
Using too much heat
Particularly risky with acrylic and synthetic fibres.
Skipping blocking entirely
Even simple projects often look noticeably better after blocking.
Final Thoughts
Blocking is one of the simplest ways to elevate your knitting or crochet projects. It helps stitches relax, improves shaping, and gives finished pieces a beautifully polished look.
Once you start blocking your projects regularly, it quickly becomes an essential part of the making process.
Whether you prefer wet blocking, steam blocking, or gentle spray blocking, taking the extra time at the end of a project can make a huge difference to the finished result.