Crochet Blanket Square Pattern – with a Celtic Knot!

This crochet blanket square pattern is Block 12 in the 2026 Moogly CAL! Thank you Tamara Kelly of the mooglyblog.com for the invitation to participate again this year!

The Celtic Square Motif is made with basic crochet stitches and Knit Picks Brava Worsted Weight yarn in 3 shades of green. (Thank you to We Crochet for providing the yarn for this project! – Click here to see their website and all the yarny goodness!) For this year’s square I picked a Celtic Knot that looks like a braided frame – it’s easier than it looks!

Plus, I have made a step-by-step video tutorial (click here to watch the tutorial) to help you with each step of this project including making the cords, weaving the cords together and edging the knot. And there is also a  Left-Hander Version of the step-by-step video tutorial! (Click here to see the Left-Hander version)

(Click here to see the post about this Block 12 on the Moogly Blog!)

(This post includes affiliate links. To read our full disclosure policy, click here)

The Celtic Knot in this Crochet Blanket Square Pattern

If you’ve participated in the Moogly CAL (Click here to read all about how the Crochet-a-long works) before than you know that I have designed 5 other crochet blanket square patterns with Celtic Knots: in 2021 (The Celtic Knot Square), in 2022 (The Celtic Woven Square), in 2023 (The Celtic Blanket Square), in 2024 (The Celtic Crochet Square) and in 2025 (The Celtic Afghan Square).

This one uses 3 cords (2 of which are the exact same thing) that magically work together to become the braided frame. If you have made the other five squares, then you will do just fine. If this is your first attempt at a Celtic Knot square design of mine, then I recommend first trying the Celtic Knot Square from 2021 here to get the hang of how these work. 

Ad-Free Pattern PDF Now Available!

Click here or on the image above to purchase the ad-free pattern PDF in my Etsy Shop. You’ll be able to download the file and print it immediately so you can work looking at paper! Plus, all video links are provided as QR codes so you can scan with your phone while you work from the pattern – the quick and easy way to see the video tutorials!

(Newsletter subscribers get to use a special Coupon Code for 20% off – sign up today 👇 to get your code Friday (6/12) afternoon!)

This photo shows how it can be helpful to print out 2 copies of the diagram so you can refer to the extra one to help you see the knot pattern while you are covering the other diagram with the cords 🙂

Celtic Knot Diagrams – for Righties AND Lefties!

The Celtic Knot Diagrams for this Celtic Crochet Square are available in Right-Hand AND Left-Hand versions!  There are not many differences between the 2 types of diagrams but since Left-Handers crochet in the opposite direction of Right-Handers, this can make following diagrams a little tricky. So, now you do not need to try to reverse the diagram in your head and get all confused – I’ve done the “flipping” for you. I hope this helps everyone be successful with weaving the knot. You’ll see a place to download the diagram in the supply list below.

Step-by-Step Video Tutorial for this Crochet Blanket Square Pattern:

Are you struggling with how to weave the Celtic Knot? Or do you need help figuring out how to do some of the stitches? Check out this step-by-step video tutorial (click here or on the image below) – in the video description you can find each section of the pattern so you can skip ahead to the part you need help with:

**Click here to watch the Left-Hander Step-by-Step Tutorial! **

Skill Level: Intermediate

(All of the stitches used in this square are basic crochet stitches. The knot weaving is not complicated but has several pieces that may be more challenging for you if this is your first time weaving a Celtic Knot – You could also try the Killarney Hot Pad first to practice a very simple Celtic Knot)

Measurements:

Completed square = 12″ x 12″

Completed knot = 7″ x 7″

Gauge:

7 sc = 2” (for cord); 7 dc = 2” and 3 ½ rows of dc = 2”

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Supplies for the Crochet Blanket Square Pattern:

Click on the supply name to purchase

(Please note this post contains affiliate links which earns this blog a small commission at no extra cost to you – it’s a win-win! Thank you for your support so I can continue to offer free patterns like this one)

Medium Weight Acrylic Yarn – 3 colors (1 skein of each is plenty)

(I used Knit Picks Brava Worsted in Peapod (medium green), Alfalfa (light green) and Dublin (dark green))

J/6 mm hook

Yarn needle

Cork board (at least 10” square)

30 straight sewing pins

Stitch markers

2 Printouts of the Celtic Knot Diagram in color – I recommend 2 so you can have one sitting next to your corkboard to refer to while you weave (the diagram you will be working on top of will get hard to see as you add the cords)

Click here for Right-Handers Diagram

Click here for Left-Handers Diagram

Special Stitches and Abbreviations:

All of these stitches are demonstrated in the step-by-step video tutorial here

Back bar of the Chain = When looking at the right side of a chain, you see many “V’s” and the chain looks like a braid. Turn the chain over and you see a series of bumps – it is in these bumps that you will work across the chain to produce a cord with even edges along both sides

Click here to watch a short video tutorial on this technique

Hdc (half double crochet) = YO, insert hook into stitch; YO, draw up a loop; YO, pull through all 3 loops on hook

Back Loop Only = Insert hook only into the back loop at the top of the stitch

Click here to watch a short video tutorial of this technique

Sl st (slip stitch) = Insert hook into stitch, YO, pull through stitch and loop on hook

Hdc2tog (half double crochet 2 together) = YO, insert hook into next st and into st after that; YO, draw up a loop; YO, pull through all 3 loops on hook

Join with hdc (join with half double crochet) = With slip knot on hook, YO, insert hook into stitch; YO, draw up a loop, YO, pull through all 3 loops on hook

Click here to watch a short video tutorial on this technique

Dc (double crochet) = YO, insert hook into stitch, YO, draw up a loop, (YO, pull through 2 loops on hook) twice

Sc (single crochet) = Insert hook into stitch, YO, draw up a loop, YO, pull through 2 loops on hook

Join with dc (join with double crochet) = With slip knot on hook, YO, insert hook into stitch; YO, draw up a loop, (YO, pull through 2 loops on hook) twice

Click here to watch a short video tutorial on this technique

Join with sc (join with single crochet) = With slip knot on hook, insert hook into stitch, YO, draw up a loop, YO, pull through 2 loops on hook

Click here to watch a short video tutorial on this technique

Adjustable Ring = Wrap yarn around hand to create a loop; pull working end of yarn through loop with hook

Click here to watch a short video tutorial on this technique

Stsc (stacked single crochet) = work 1 single crochet as usual; insert hook into left bar of front 2 bars of sttich just worked; YO, draw up a loop; YO, pull through both loops on hook

Ext. dc (extended double crochet) = YO, insert hook into stitch, YO, draw up a loop; YO, pull through first loop on hook; (YO, pull through 2 loops on hook) twice

YO = yarn over

Hk = hook

Ch = chain

Lp = loop

Sp = space

Sk = skip

Notes:

First 3 cords are crocheted and then woven into the decorative knot

Then stitches are added around the edge of the completed knot to make the square shape

Lastly a small motif is crocheted and sewn to the center opening

Instructions for the Celtic Square Motif (a Crochet Blanket Square Pattern by Jennifer E Ryan):

All special stitches are written in bold and italicized text & defined above

You will mark several stitches with stitch markers (highlighted in blue) to help you add the edgings later- using 2 different colored markers is best for the 4-Point Cord

Here you can see the Rectangle Cord without the edging and the 4 stitch markers

Rectangle Cord – Make 2:

Approximately 20 ½” long x 1” wide (with edging)

With Peapod (medium green) ch 67

Working in the back bar of the chain, hdc in 3^rd ch from hk and in each of next 2 chs;

2 hdc in next ch; (Mark 2^nd hdc with pink stitch marker)

Hdc in each of next 10 chs;

2 hdc in next ch; (Mark 2^nd hdc with pink stitch marker)

Hdc in each of next 21 chs;

2 hdc in next ch; (Mark 2^nd hdc with pink stitch marker)

Hdc in each of next 10 chs;

2 hdc in next ch; (Mark 2^nd hdc with pink stitch marker)

Hdc in each of next 17 chs;

Fasten off.

Here you can see both Rectangle Cords completed with the edging and the stitch markers (that we will keep in through weaving the knot to help us add crochet around the knot later)

Cord Edging:

With Alfalfa (Light Green) and working in the back loop only, join with sl st in 1^st st of cord;

Sl st in each st across;

At each stitch marker: sl st, ch 1, move stitch marker to bottom of stitch (on other side of cord) and place another stitch marker in ch-1 sp just made

At end of cord, (ch 1, sl st) across short end;

Sl st across other side of cord still working in back loop only;

At each pink stitch marker (on other side of cord): sk st (remove stitch marker)

Fasten off.

Here is the 4-point cord without any edging and both colors of stitch markers

4-Point Cord:

Approximately 32” long x 1” wide (with edging)

With Peapod (Medium Green) ch 111

Working in the back bar of the chain, hdc in 3^rd ch from hk;

*2 hdc in next ch; (Mark 2^nd hdc with a pink stitch marker)

Hdc in each of next 2 chs;

(Hdc, ch 1, sl st in back bar of ch, hdc) in next ch; (Mark ch-1 sp with pink stitch marker and mark bottom of stitch worked in with blue stitch marker)

Hdc in each of next 2 chs;

2 hdc in next ch; (Mark 1^st hdc with pink stitch marker)

Hdc in each of next 9 chs;

Hdc2tog; (Mark top of this st with blue stitch marker) *Please note that I recommend a non-traditional way of doing the hdc2tog – you can see the definition in the list of Special Stitches above 🙂*

Hdc in each of next 9 chs;*

Repeat from * to * 3 times (last repeat only work 8 hdc at very end of chain length).

Fasten off.

Here is the 4-point cord with edging and stitch markers (that we will keep in through weaving the knot to help us when adding the crochet stitches around the completed knot)

Edging:

With Alfalfa (Light Green) and working in the back loop only, join with sl st in 1^st st of cord;

Sl st in each st across;

At each pink stitch marker: sl st, ch 1 (replace each pink stitch marker that is on sides of points- see photo above & you can remove all stitch markers at center points which will become the corners in our finished Celtic Knot)

At each blue stitch marker: sk st (you can remove all blue stitch markers)

At end of cord, (ch 1, sl st) across short end;

Sl st across other side of cord still working in back loop only making sure to sk a st at each blue stitch marker. Fasten off.

Here are the weaving supplies: corkboard, pins, diagram printout and completed cords with stitch markers in them

Weaving The Celtic Knot:

**Remember you can watch the video tutorial to get help on weaving the knot and adding the crochet stitches around the knot – click here to see the tutorial**

**And you can see the Left-Hander tutorial here**

We will be weaving the black path first, then the green and then the light green (it looks yellowy)

I made my cords in 3 different colors to help you see the design of the Celtic Knot better

1. Place color printout of Celtic Knot Diagram on corkboard

There are 2 versions of the diagram – one for Right -Handers and one for Left-Handers – make sure to print out the correct one!

Remember, you may want to print out 2 copies of your diagram so you can have one sitting next to your work surface to help you see the design of the knot (see photo above near top of this post)

2. Place beginning of 4-point cord (the end with only the edging yarn tails) on the black square

3. Follow the arrow and place cord along the black path making sure all points match up with diagram

4. Place beginning of one of the Rectangle cords (the end with only the edging yarn tails) on the black asterisk

5. Follow the arrow and place cord along the dark green path making sure to pass correctly either OVER or UNDER the other cord sections

6. Place beginning of the other Rectangle cord (the end with only the edging yarn tails) on the black circle

7. Follow the arrow and place cord along the light green path making sure to pass correctly either OVER or UNDER the other cord sections

8. Adjust cords to knot design and spaces are even – All stitch markers should be along each side of the square

9. Pin several crossings across and through all layers – remove knot from board

10. With yarn needle and yarn tails sew cord ends together on Wrong Side

Keep pins in to help Celtic Knot hold its shape – I recommend securing the cords later after adding the edging

Knot Edging for the Crochet Blanket Square Pattern:

You will work 5 rounds around entire woven knot

The stitch markers will help keep your place as you work into the stitches along the outer edges of all the cords

Please refer to the Celtic Knot diagram for placement of the sts (You will see numbers, letters & red circles there that correspond to the sts listed below:

A, B, C, D = sections of cords where will add sts

1, 2, 3 = Valleys where will work tall sts

4 red circles = ch-1 sps marked by stitch markers)

Round 1:

**This is the most difficult part of the entire project so make sure to watch the video tutorial here to help you with this section – and, of course, you are always welcome to leave a comment below, on the video or send me an email – I am happy to help you be successful!**

(Click here to watch this section for Left-Handers)

With Dublin (dark green) and working in the loop BEHIND the sl st edging, join with hdc at any corner;

(In the photo below you can see which loop is the loop “behind” – one is pointed to with the white arrow and another one has the needle inserted into it – this way the slip stitch edging is not disrupted and our knot design will look its best)

(ch 1, hdc) in same st;

*4 hdc across Area “A”; (Here you may have a different number of sts on your cord than I do but just make sure that you only have 4 hdcs in this area putting one hdc in each st -same goes for Area D)

Hdc in next ch-1 sp (marked with stitch marker and red circle on diagram);

Dc in Valley 1 (work in st 3 sts back from next ch-1 sp);

Hdc in each of next 2 sts;

Sc in next ch-1 sp (next red circle in Area “B”);

Hdc in each of next 2 sts;

Dc in Valley 2 (work in st 3 sts back from next ch-1 sp);

Hdc in each of next 2 sts;

Sc in next ch-1 sp (next red circle in Area “C”);

Hdc in each of next 2 sts;

Dc in Valley 3 (st next to next ch-1 sp);

Hdc in next ch-1 sp (next red circle);

4 hdc across Area “D”

(hdc, ch 1, hdc) in next st (next corner); *

Stitch count check: Area “B” = 5 sts (in between dc’s)

Area “C” = 5 sts (in between dc’s)

Total across each side = 25 sts with ch-1 sp at each corner

Repeat * to * around;

Last repeat do not work portion with pink highlight and join with sl st to 1^st hdc.

Round 2:

Sl st into next ch-1 sp; (ch 4, dc) in same ch-1 sp;

[dc in each st across; (dc, ch 1, dc) in next ch-1 sp at corner] around ending with sl st in 3^rd ch of starting ch-4. (27 dc across each side with a ch-1 sp at each corner)

Round 3:

Repeat Round 2 (29 dc along each side with a ch-1 sp at each corner)

Fasten off.

Round 4:

With Peapod (medium green) join with dc in any ch-1 sp at corner;

(ch 1, dc) in same sp;

[dc in each st across; (dc, ch 1, dc) in next ch-1 sp] around; join with sl st to 1^st dc of round. Fasten off. (31 dc along each side with a ch-1 sp at each corner)

Round 5:

With Alfalfa (light green) and working in the back loop only, join with sc in any ch-1 sp at corner; (ch 1, sc) in same sp;

[sc in each st across; (sc, ch 1, sc) in next ch-1 sp] around; join with sl st to 1^st sc of round. Fasten off. (33 sc along each side with a ch-1 sp at each corner)

Center Small Motif:

This motif works up quickly but you can find the video demonstration here – I recommend watching it especially if some of these stitches are new to you – it is not difficult but would probably help you to see it demonstrated

(Click here to watch the same section for Left-Handers)

Round 1:

With Dublin (dark green) and in an adjustable ring:

Stsc, dc; (dc, ext. dc, 3 dc) 3 times; (dc, ext. dc, dc) one more time; join with sl st to 1^st st.

(I marked each ext. dc with a stitch marker so I could count my sts and corners)

Round 2:

Working in st to Right of joining st, stsc; dc in each of next 2 sts;

*ch 1, 2 sl st down side of last dc worked; sl st in same st; sl st in each of next 2 sts;

Stsc in next st; dc in each of next 2 sts; *

Repeat * to * around ending with sl st at base of 1^st st. Fasten off with long tail for assembly.

Finishing of the Crochet Blanket Square Pattern:

Place Center Small Motif in center of Celtic Knot with both Right Sides facing up– with long yarn tail and yarn needle sew motif to center of Celtic Knot (on Wrong Side) making sure to pass needle through back loop only on the small motif and through the loops behind the sl st edging on all of the cords

Weave in all ends while securing all crossings of knot on Wrong Side of project

Weave in all ends on Wrong Side of square – Sew more of knot cords together at crossings to secure

Can use yarn tails to sew together any gaps between the cords

Blocking:

Wet square with cold water so soaked through

Press out excess water with a clean towel

Lay out square on dry towel and flat surface pulling out spaces and stitches so lay flat and evenly;  

Optional: Place corkboard under towel and pin square taut at corners and along sides to the 12” measurement

Let dry completely

Your Celtic Square Motif is Complete!

Tada! Your crochet blanket square pattern, the Celtic Square Motif, is complete! I hope all of the photos, diagrams and videos helped you be successful – if you have any questions, please leave a comment below or send me an email. I am happy to help!

You can find more Celtic Knot patterns here!

And you can see ALL of my FREE crochet patterns on this page here.

Don’t forget to pin the image below so you remember where you found this Celtic Square Motif pattern!

And here is the link to the full step-by-step video tutorial for you – Celtic Square Motif Tutorial.

(Click here for the Left-Hander Video Tutorial)

Thank you for visiting – Happy crocheting!

Jennifer

Copyright – Jennifer E Ryan- www.celticknotcrochet.com- all rights reserved. No part of this publication may be reproduced, distributed or transmitted in any form or by any means, including photocopying, recording or other electronic or mechanical methods, without the prior written permission of the publisher but please do link to this page to share this pattern with others.

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