Crochet Octagon Pinwheel Granny Square Pattern

Learn how to crochet an octagon inside a granny square with this free crochet pattern. The pinwheel centre is made with US Treble crochet stitches to create an open granny square pattern that is unique.

Octagon Pinwheel Granny Square pattern

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Octagon Pinwheel Granny Square | Free Crochet Pattern

This free granny square pattern takes the crochet octagon with a pinwheel centre and squares off the design to create an open granny square.

I can see this square being used in more than just crochet granny square blankets – I would love to see it stitched up in cotton yarn and joined to create summer cardigans or vest tops.

The pinwheel detail adds a unique start to this project that creates lots of lovely open space in the granny square.

Purchase the Printable Patterns

You can purchase a printable copy of the full Hodgepodge Blanket pattern including the joining and edging

Octagon Pinwheel Granny Square pattern


US Terms (UK terms in brackets)

St(s) – Stitch(es)

Ch – Chain

HDc (HTr) – Half Double Crochet (Half Treble Crochet)

Dc (Tr) – Double Crochet (Treble Crochet)

Tr (DTr) – Treble Crochet (Double Treble Crochet)

Skill level: Advanced Beginner


  • Aran/worsted weight yarn
  • I used used 80m PaintBox Simply Aran 100% Acrylic yarn in the following shade:
  • 250
  • 5mm Crochet Hook
  • Scissors
  • Tapestry needle


  • gauge not essential – Use a larger or smaller crochet hook to obtain the correct finished square size.

Finished Size: 

  • 8″ x 8″
Easy Granny Square Blanket Pattern

How to crochet this Octagon Pinwheel Granny Square Pattern

Pattern Notes:

  • Please read through the entire pattern before beginning, regardless of skill level. Please contact me ([email protected]) if help is needed to understand any part of pattern.
  • This square is worked in the round
  • Beginning ch-1 does NOT count as stitch.
  • Beginning ch-4 DOES count as Treble Crochet.

Round 1: Ch 5, sl st to 1st to form ring, ch 6 (counts as tr, ch 2), [tr, ch 2] 7 times in ring, join. (8 tr, 8 ch-2 sps)

Round 2: Sl st to next ch-2 sp, ch 4 (counts as tr here and throughout), 4 tr in same ch-2 sp, *ch 2, 5 tr in next ch-2 sp; repeat from * around, join. (40 tr, 8 ch-2 sps)

Octagon Pinwheel Granny Square Pattern

Round 3: Ch 4, tr in next 4, *(tr, ch 2, tr) in next ch-2 sp, tr in next 5; repeat from * around to last ch-2 sp, (tr, ch 2, tr) in last ch-2 sp, join. (56 tr, 8 ch-2 sps)

Round 4: Ch 1 (does not count), hdc in same, hdc in next 5, *(hdc, ch 1, dc) in next ch-2 sp, dc in next 2, tr in next, ch 6, skip 1, tr in next, dc in next 2, (dc, ch 1, hdc) in next ch-2 sp, hdc in next 7; repeat from * around to last ch-2 sp, hdc in last ch-2 sp, join. (36 hdc, 24 dc, 8 tr, 4 ch-6 sps)

Easy Crochet Granny Square Blanket

Round 5: Ch 1, working in sts and ch-1 sps, hdc in each around, placing 1 hdc in each ch-1 sp and (3 hdc, ch 3, 3 hdc) in each ch-6 sp, join. (100 hdc, 4 ch-3 sps)

Hodgepodge Granny Square Blanket CAL

Join the fun of this event is running from 15th August 2022 – 13th September 2022 with 30 new granny squares designs, one released each day. 

Click here to see all the 30 granny square designs

A huge thank you to my pattern testers and editor who kindly helped test all 30 of the square designs to check for accuracy in this pattern – it’s always such a pleasure to see a pattern come to life.

Octagon Pinwheel Granny Square pattern

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