Celtic Knot Mosaic Crochet Square – Free Pattern + Chart
Ready to try something that looks impressive but is surprisingly simple? This mosaic crochet square features a stunning Celtic knot design, created using basic stitches and an easy-to-follow method. I’ll walk you through the process so you can stitch with confidence as you work through the free chart.
Inspired by the timeless Irish knot, this square’s interwoven lines symbolize connection and continuity. It feels especially fitting around St. Patrick’s Day, but its meaning carries beautifully throughout the year as we stitch in community. This square is designed to fit seamlessly into the Mosaic Grannies Collection, while shining on its own.
At a Glance
- Finished Size: 12” x 12″ square
- Skill Level: Easy
- Technique(s): Overlay mosaic crochet in the round, from the center out
- Yarn: Worsted/medium (#4) weight yarn
- Hook: H/8 (5.00mm)
A Mosaic Crochet Granny Square Worked in the Round
The Celtic Knot Square is worked using overlay mosaic crochet in the round, a technique that creates bold, graphic designs by layering stitches over previous rounds. Instead of working into every stitch as usual, select stitches are dropped down and worked over the round below to form the intricate-looking knot pattern.
It may seem a little complex, but this technique is so much easier than you may think! It’s built from simple stitches worked in a clever way. Once you start, it all clicks. And I’ve provided photos and video tutorials to help you along!
Because this square is worked in the round, you’ll also carry your yarn as you go rather than cutting it at the end of each round. That means far fewer ends to weave in—and more time to enjoy watching the design unfold (always a win!).
Never tried this before? That’s OK! Watch my YouTube tutorial to learn more about how to do overlay mosaic crochet from the center out.
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More Mosaic Granny Square Patterns
This is just one of the gorgeous mosaic crochet square designs available on the blog. If you like this square, be sure to check out these other ones:
More Granny Square Blanket Crochet Alongs (CALs)
The Mosaic Grannies Collection
This square is part of the Mosaic Grannies Collection, a year-long crochet-along.
The full experience – including community, early access, and bonuses – lives inside the Crochet Collective.
Bonuses included inside the Collective:
- Monthly Sip & Stitches to show off your squares
- Written instructions AND mosaic chart AND color blocks for each square (not guaranteed on the blog)
- Early access to squares – there’s several in there already!
- Multiple Seaming & Border Options
You can also purchase all 12 granny square patterns in an eBook from my shop (you can add the pattern to your Ravelry library from there). The patterns will be released gradually throughout the year, allowing you to enjoy a slow, relaxed crochet rhythm. You’re welcome to work along month by month—or jump in and stitch at your own pace as patterns become available.
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The Celtic Knot Mosaic Crochet Square
If you make this pattern be sure to post pictures on social media and tag @juniperandoakes and use the hashtag #juniperandoakes. I would love to see your work!
The mosaic crochet chart is provided free for you on this website further down below, but if you would like a ad-free, printable version of this granny square pattern, you can join the Crochet Collective or buy the eBook from my shop (you will be able to add the patterns to your Ravelry product library). Either of these options gives you lifetime access to not only the chart but also written instructions for this square and 11 others to make a whole mosaic crochet blanket.
Or you can grab just this square pattern from Etsy or Ravelry, using the links below.
The Celtic Knot Square is Square 3 of the Mosaic Grannies Collection.
Skill Level: Easy
Materials
- Yarn: Medium (4) Worsted Weight yarn
- Color A: Pink – 100 yards
- Color B: Cream – 100 yards
- Hook: H/8 – 5.0mm
- Yarn needle
- Scissors
Gauge
9 Rounds in 4″ x 4″ square
May change hook size, or add/sutract rounds to meet 12″ square measurement
Finished Measurements
12″ x 12″ square
Stitch Abbreviations (US Terminology)
- BLOsc – Back Loop Only Single Crochet
- ch – Chain
- FLOdc – Front Loop Only Double Crochet
- mc – Magic Circle
- sc – Single Crochet
- sk – Skip
- sl st – Slip Stitch
- st – Stitch
- sp – Space
Special Stitches
Corner
BLOsc, ch1, BLOsc
Worked together into the BLO of the ch 1 of the corner in the row below.
Back Loop Only Single Crochet (BLOsc)
Insert hook through the back loop of indicated stitch, yo, pull up a loop, yo pull through both loops on hook.
Front Loop Only Double Crochet (FLOdc)
Yo, insert hook through the front loop of the stitch 2 rows below, yo, pull up a loop, yo, pull through two loops on hook, yo, pull through remaining loops.
Invisible Join
Work last stitch, Remove hook from loop, Insert hook through back of 1st stitch of row, Grab dropped loop, Pull yarn loop though. (May also use sl st to join.) Click here for a video tutorial.
Pattern Notes
- Pattern is overlay mosaic crochet worked in the round from the center out. Watch this video to learn more about how to mosaic crochet from the center out. *Note: This video demonstrates the technique on another pattern but the basics are the same.
- Ch 1 at the beginning of a round does not count as a stitch.
- If you tend to have loose tension when you crochet, you may need to go down a hook size or choose a light worsted weight yarn to make this an 12″ square.
- Sts between *asterisks* are repeated on each side of the square
- Each round (except Round 1) begins with the corner sts.
- The Corner stitches (BLOsc, ch1, BLOsc) are worked together into the BLO of the ch1 of the corner in the row below.
- Carry the unworked yarn under the first BLOsc of each corner, then drop the unworked yarn to the wrong side of the work and continue working.
- Work an invisible join after each round.
- A chart for this pattern is included as well.
Mosaic Crochet Chart for the Celtic Knot Square
Written Pattern for the Celtic Knot Square
After each round, work an invisible join.
Round 1: With Color A, make a mc, ch 1, 8 sc in mc.
Round 2: With Color B, ch 1, *Corner (see Special Stitches), BLOsc, repeat from * around.
Round 3: With Color A, ch 1, *Corner, BLOsc x3, repeat from * around.
Round 4: With Color B ch 1, *Corner, BLOsc x5, repeat from * around.
Round 5: With Color A, ch 1, *Corner, BLOsc x3, FLOdc x1, BLOsc x3, repeat from * around.
Round 6: With Color B, ch 1, *Corner, BLOsc x1, [FLOdc x1, BLOsc] x4, repeat from * around.
Round 7: With Color A, ch 1, *Corner, BLOsc x3, [FLOdc x1, BLOsc x3] x2, repeat from * around.
Round 8: With Color B, ch 1, *Corner, BLOsc x1, [FLOdc x1, BLOsc x3, FLOdc x1, BLOsc x1] x2, repeat from * around.
Round 9: With Color A, ch 1, *Corner, BLOsc x1, [FLOdc x1, BLOsc x5] x2, FLOdc x1, BLOsc x1, repeat from * around.
Round 10: With Color B, ch 1, *Corner, BLOsc x5, [FLOdc x1, BLOsc x5] x2, repeat from * around.
Round 11: With Color A, ch 1, *Corner, BLOsc x3, [FLOdc x1, BLOsc x5] x2, FLOdc x1, BLOsc x3, repeat from * around.
Round 12: With Color B, ch 1, *Corner, BLOsc x3, [FLOdc x1, BLOsc x1, FLOdc x1, BLOsc x3] x3, repeat from * around.
Round 13: With Color A, ch 1, *Corner, BLOsc, [FLOdc, BLOsc x3] x5 FLOdc x1, BLOsc x1, repeat from * around.
Round 14: With Color B, ch 1, *Corner, [(BLOsc x1, FLOdc x1) x2, BLOsc x5, FLOdc x1, BLOsc x1, FLOdc x1] x2, BLOsc x1, repeat from * around.
Round 15: With Color A, ch 1, *Corner, BLOsc x1, [FLOdc x1, BLOsc x3] x6, FLOdc x1, BLOsc x1, repeat from * around.
Rounds 16: With Color B, ch 1, *Corner, BLOsc x7, FLOdc x1, BLOsc x1, FLOdc x1, BLOsc x9, FLOdc x1, BLOsc x1, FLOdc x1, BLOsc x7, repeat from * around.
Round 17: With Color A, ch 1, *Corner, BLOsc x3, [FLOdc, BLOsc x3] x7, repeat from * around.
Round 18: With Color B, ch 1, *Corner, [(BLOsc x1, FLOdc x1) x4, BLOsc x4,] x2, [BLOsc x1, FLOdc x1] x4, BLOsc x1, repeat from * around.
Round 19: With Color A, ch 1, *Corner, BLOsc x3, [FLOdc, BLOsc x3] x8, repeat from * around.
Round 20: With Color B, ch 1, *Corner, BLOsc x1, [FLOdc x1, BLOsc x3, FLOdc x1, BLOsc x1] x6, repeat from * around.
Round 21: With Color A, ch 1, *Corner, BLOsc x1, [FLOdc x1, BLOsc x5] x6, FLOdc x1, BLOsc x1, repeat from * around.
Round 22: With Color B, ch 1, *Corner, BLOsc x5, [FLOdc x1, BLOsc x5) x6, repeat from * around.
Round 23: With Color A, ch 1, *Corner, BLOsc x3, [FLOdc x1, BLOsc x5,] x6, FLOdc x1, BLOsc x3, repeat from * around.
Round 24: With Color B, ch 1, *Corner, BLOsc x3, [FLOdc x1, BLOsc x1, FLOdc x1, BLOsc x3] x7 repeat from * around.
Round 25: With Color A, ch 1, *Corner, BLOsc x1, [FLOdc x1, BLOsc x3,] x11, FLOdc x1, BLOsc x1, repeat from * around.
Round 26: With Color B, ch 1, *Corner, BLOsc x1, FLOdc x1, BLOsc x1, FLOdc x1, BLOsc x5, [FLOdc x1, (BLOsc x1, FLOdc x1) x3, BLOsc x5] x3, FLOdc x1, BLOsc x1, FLOdc x1, BLOsc x1, repeat from * around.
Fasten off.
Weave in ends.
Block to 12″.
The Fine Print
This pattern and its images are the property of Juniper and Oakes ©2025. The pattern is for your personal use only. Please do not copy/paste, distribute, or alter and claim as your own. You may sell products made by this pattern, but please credit @juniperandoakes.
Please post pictures on social media and tag @juniperandoakes and use the hashtag #juniperandoakes. You can also post pictures in the Juniper + Oakes Crochet Community Facebook Page.
Let me know if you run into a problem. I respond quickly and will help any way I can to clarify any confusion or challenging stitches.
hi Erin,
on round 4 I think there’s a typo it’s says 4 BLOsc but I think it should be 5
Hi Yvonne,
You are correct. There is a typo that we’ll get corrected asap. Thank you for catching it and for letting us know.
Erin