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Learn how to crochet the block stitch granny square with this free step-by-step pattern. If you’ve fallen in love with granny squares (who hasn’t?!), the Block Stitch Granny Square is a fantastic variation to add to your crochet stitch library. This simple colour play creates a fun adaptation of the traditional granny square.

About This Granny Square
The Block Stitch Granny Square is based on the traditional granny square construction, but inbetween the clusters you’ll be adding a colour change using the double crochet (US treble).
You can use as many colours as you wish in the colour changes, so it’s a great square for experimenting with colour, as each “block row” can be a different shade. A dream for using up leftover yarn or creating a rainbow gradient, bright bold blocks or using a varigated yarn. This granny square is really versatile and has so much potential!
Ways to Use This Stitch
- Blankets
- Cushions
- Tote Bags
Pattern Notes
- Written in UK terms but switchable to US crochet terms below.
- Skill Level: Intermediate
- I always recommend blocking your granny squares before joining.

Need Pattern Support? Join Our Facebook Group
The fastest way to get pattern support is to ask in our dedicated facebook group for Bella Coco Crochet patterns. This is the best place for you to connect with other crocheters.
Please note, if you wish to change and adapt this pattern in any way, this must be done at your own exploration and we cannot offer assistance with this.
Materials & Tools
- Yarn: You can use any weight yarn and recommended hook size that can be found on the belly band to your chosen yarn.
- Hook: Use the corresponding hook size to the yarn weight chosen.
- Darning Needle
- Scissors
- Tape Measure
- Blocking Board (UK) / Blocking Board (USA) (optional)
Where to Shop for Yarn

Convert Pattern Terms
Here you can quickly switch between UK and US crochet terms. This will make following the pattern easier as all terms will be converted to your preferred version.
Terms & Abbreviations
Chain(s): ch(s): Yarn over, pull through loop on the hook.
Slip Stitch(s): ss(s): Insert hook, yarn over, pull through stitch and loop on hook.
Double Crochet(s): dc(s): Insert hook into stitch, yarn over, pull up a loop, you will have two loops on the hook. Yarn over, pull through remaining two loops.
Treble Crochet(s): tr(s): Yarn over, insert into stitch, yarn over, pull up a loop, you will have three loops on the hook. Yarn over, pull through two loops, yarn over, pull through remaining two loops.
Unsure of the differences between UK and US terms? Need a refresher on how to do your crochet stitches? In my ‘How to crochet: A handy reference guide’ EBook I help you with all of these terms and you can always have them to hand! You will also get exclusive access to free video instructions. You can find my EBook HERE.
Tips For Tension
Do you struggle with tension? Watch this helpful tutorial below for essential crochet tips for tension!
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Free Crochet Pattern: Block Stitch Square
You are viewing this pattern in UK terms.
- Ch 4, ss in 4th ch from the hook.
1-3
- Round 1: 3 ch (counts as tr here and throughout), into ring work 2 tr, 3 ch, *3 tr, 3 ch, repeat from * twice more, join with ss into top of 3-ch. Fasten off. (12 tr, 4 3-ch sps)
- Join yarn B into any 3-ch sp with a ss.
- Round 2: 1 ch (does not count as st here or throughout), [dc, 3 ch, dc] in same sp, *2 ch, [dc, 3 ch, dc] in next 3-ch sp, repeat from * twice more, 2 ch, join with ss into top of dc. Fasten off. (8 dc, 4 2-ch sps, 4 3-ch sps)
- Join yarn A into any corner 3-ch sp with a ss.
- Round 3: 3 ch, work [2 tr, 3 ch, 3 tr] in same sp, *1 ch, 3 tr in next ch sp, 1 ch, [3 tr, 3 ch, 3 tr] in 3-ch corner sp, repeat from * twice more, 1 ch, 3 tr in next ch sp, 1 ch, join with ss to top of 3-ch. Fasten off. (36 tr, 8 1-ch sps, 4 3-ch sps)
- Join yarn B into any corner 3-ch sp with a ss.
4-5
- Round 4: 1 ch, [dc, 3 ch, dc] in same sp, *2 ch, [dc in next ch sp, 2 ch] to corner 3-ch sp, [dc, 3 ch, dc] in 3-ch sp, repeat from * twice more, 2 ch, [dc in next ch sp, 2 ch] to end, join with ss to top of beginning dc. Fasten off. (16 dc, 12 2-ch sps, 4 3-ch sps)
- Join yarn A into any corner 3-ch sp with ss.
- Round 5: 3 ch, [2 tr, 3 ch, 3 tr] in same sp, *1 ch, [3 tr in next ch sp, 1 ch] to corner 3-ch sp, [3 tr, 3 ch, 3 tr] in corner 3-ch sp, repeat from * twice more, 1 ch, [3 tr in next ch sp, 1 ch] to end, join with ss to top of 3-ch. Fasten off. (60 tr, 16 1-ch sps, 4 3-ch sps)
- Repeat Rounds 4 and 5 until desired size, changing colour every round.
- Fasten off and sew in ends.

Granny Squares To Try Next
Have you tried these granny squares?




- Sunburst Granny Square
- Spiral Granny Square
- Bobble Circle Granny Square
- Mitered Granny Square
- Click Here to Explore Over 10 FREE Granny Square Designs
Click below to explore the FREE stitch library.

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I always love to see your makes so if you try any of my patterns or follow my stitch tutorials please tag me @bellacococrochet or use the #bellacococrochet


