Clamshell Stitch Square Crochet Blanket

Add a bit of color to your life with this Clamshell Stitch Square Crochet Blanket free pattern.

Scroll down to see the Clamshell Stitch Square Blanket free crochet pattern or you may choose to purchase the ad-free, printable PDF crochet pattern with stitch chart HERE on ETSY or HERE on Ravelry.

Worked in the rounds Clamshell Stitch Blanket free crochet pattern.

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I’m so excited to show you my latest design called Clamshell Stitch Square Crochet Blanket because completing some big project is always acompanied by such a feeling of relief and accomplishment!

If you follow my work, you may remember the Clamshell Shawl I released earlier this year.

From the moment I started working on the Clamshell Shawl, I knew I wanted to make a square blanket using the clamshell stitch pattern as well.

Not only is this stitch pattern colorful and cheerful, but also very versatile.

This Clamshell Stitch Square Blanket is worked in the rounds from the center out.

It features a scallop-shaped pattern which uses only basic stitches and creates amazing structure.

I recommend you to use two or more colors for this pattern, because its beauty lies in changing colors with every clamshell.

The best part about this blanket is the easy size markers. Just add a few more rows depending on how large you want it!

Not only is this clamshell stitch square blanket pattern a sweet treat for your eyes, it’s a cozy cover you’ll love wrapping up in while relaxing.

DK weight, Scheepjes’ Softfun yarn makes this crochet afghan even more cuddly than you could’ve thought possible.

Have fun choosing whichever colors you like and make this clamshell stitch square blanket for your own home or share its sunny cheer with a friend and make it as a gift.

OTHER CROCHET BLANKET FREE PATTERNS YOU MIGHT LOVE

If you want to share your wips and finished clamshell stitch crochet blanket on social media, please, use hashtag #mycrochetory. I love to see your finished project!

CLAMSHELL STITCH SQUARE CROCHET BLANKET FREE PATTERN

Purchase the ad-free, printable PDF with stitch chart here on ETSY or here on Ravelry.
Add this pattern to your Ravelry Queue HERE.
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Copyright 2021 – 2022 MyCrochetory. All right reserved. This pattern is property of Sylwia Kawczyńska @MyCrochetory. Please DO NOT sell the pattern and claim this pattern as your own. The pattern is for personal use only and may not be translated or reproduced in another language. Please respect my rights, DO NOT share or publish this pattern anywhere without my permission.

The clamshell stitch crochet blanket you make following this pattern is yours you are free to sell it, as long as you credit MyCrochetory as original designer. For more information, please, read Terms Page.

As a bonus in the ad-free, printable PDF, I’ve provided a stitch chart. If you’re a visual learner or if you just want to support my work you can purchase this crochet pattern HERE on ETSY or HERE on Ravelry. Thank you and I hope you find it useful!

Worked in the rounds Clamshell Stitch Blanket free crochet pattern. Stitch chart included in pattern PDF available to purchase.

Materials & Tools:

Yarn SCHEEPJES Softfun 50g =140m, 60% Cotton, 40% Acrylic.

Yarn A: 2401 Prussian – approx. 308m,

Yarn B: 2534 Cyclamen – approx. 392Xm + for tassels (optional),

Yarn C: 2621 Mustard – approx. 448m,

Yarn D: 2644 Lagoon – approx. 476m,

Yarn E: 2412 Snow – approx. 504m.

Hook size 4mm. Adjust hook size if necessary to obtain correct gauge.
Tapestry needle (to weave and hide yarn ends).
Scissors,
4 stitch markers.

Level:

Intermediate – clamshell stitch pattern.

Size after blocking:

Approx. 110cm x 110cm (43.3’’ x 43.3’’).

Gauge after blocking:

After 15 rounds square masures approx. 21 x 21cm (8.25” x 8.25”).

Gauge is not crucial for this project. However, changes might result in a different yardage requirements and the finished size.

Notes:

The pattern uses US crochet terminology.
If you are not familiar with the clamshell crochet stitch or need a refresher, check out my photo tutorial HERE before beginning your project.
The blanket is worked in one piece in the rounds from the center out but after each round you will turn your blanket and work on the backside.
Each round builds on the next, and each round starts in the corner chain space.
Place the stitch marker in every ch-2sp corner.
You can also use yarn in different weights, but just know that the width will be different depending on your gauge.
You can make this blanket as big as you like by adding or substracting pattern repeats.
In the parenthesis (…) there is a stitch counting for each round.
If the previous round starts with a turning chain which counts as a stitch then work your last stitch of the next round in top of beginning turning chains, unless otherwise stated.
Instructions in square brackets […] or in {…} are worked as many times as indicated.
The stitch chart is included in the ad-free printable PDF here on ETSY or here on Ravelry.

Stitches & Abbreviations (US terms):

ch(s) – chain(s) stitch

st(s) – stitch(es)

sc – single crochet

hdc – half double crochet

dc – double crochet

slst – slip stitch

yo – yarn over

PM – place marker

M – marker

RPM – reposition marker

sp – space

sk – skip

clamshell spike – (see picture tutorial) – skip first slip stitch and work first double crochet one row below the next slip stitch (into the single crochet one row below this second slip stitch), work a second double crochet right below your last double crochet – into the single crochet two rows below and work the third double crochet by putting this stitch into exactly the same stitch that the first double crochet was placed, skip third slip stitch.

PATTERN

Read all Notes before you start.

Using Yarn A, start with a magic ring or with 5ch and sl st in the first st to close the round.

Round 1: ch1 (doesn’t count as a st), [3sc in the ring, ch2, PM] rep 4 times in total, slst in first sc of the round to close the round. Turn. (12sc, 4ch-2sp)

Round 2: 2slst in ch-2sp, ch1 (doesn’t count as a st), sc in ch-2sp, [sc in each st until next ch-2sp, (sc, ch2, RPM, sc) in ch-2sp] rep 3 times in total, sc in each st until next ch-2sp, sc in ch-2sp, ch2, RPM, slst in first sc of the round to close the round. Turn. (20sc, 4ch-2sp)

Round 3: 2slst in ch-2sp, ch3 (counts as a st), [hdc in next st, slst in next 3sts, hdc in next st, (dc, ch2, RPM, dc) in ch-2sp] rep 3 times in total, hdc in next st, slst in next 3sts, hdc in next st, dc in next ch-2sp, ch2, RPM, slst at the top of ch3 to close the round. Change to Yarn B in final st. Turn. (28sc, 4ch-2sp)

Round 4: 2slst in ch-2sp, ch1 (doesn’t count as a st), sc in ch-2sp, [sc in next st, hdc in next st, clamshell spike, hdc in next st, sc in next st, (sc, ch2, RPM, sc) in ch-2sp] rep 3 times in total, sc in next st, hdc in next st, clamshell spike, hdc in next st, sc in next st, sc in next ch-2sp, ch2, RPM, slst in first sc of the round to close the round. Turn. (36sc, 4ch-2sp)

Round 5: Rep Round 2. (44sc, 4ch-2sp)

Round 6: 2slst in ch-2sp, ch2 (doesn’t count as a st), hdc in ch-2sp, {slst in next 3sts, [hdc in next st, dc in next 3sts, hdc in next st, slst in next 3sts] rep across until next ch-2sp, (hdc, ch2, RPM, hdc) in ch-2sp} rep 3 times in total, slst in next 3sts, [hdc in next st, dc in next 3sts, hdc in next st, slst in next 3sts] rep across until next ch-2sp, hdc in next ch-2sp, ch2, RPM, slst in first hdc of the round to clode the round. Change to Yarn C in final st. Turn. (52sc, 5ch-2sp)

Round 7: 2slst in ch-2sp, ch1 (doesn’t count as a st), sc in ch-2sp, {hdc in next st, clamshell spike, hdc in next st, [sc in next 3sts, hdc in next st, clamshell spike, hdc in next st] rep across until next ch-2sp, (sc, ch2, RPM, sc) in ch-2sp} rep 3 times in total, hdc in next st, clamshell spike, hdc in next st, [sc in next 3sts, hdc in next st, clamshell spike, hdc in next st] rep across until next ch-2sp, sc in next ch-2sp, ch2, RPM, slst in first sc of the round to close the round. Turn. (60sc, 4ch-2sp)

Round 8: Rep Round 2. (68sc, 4ch-2sp)

Round 9: 3slst in ch-2sp, {slst in next st, [slst in next st, hdc in next st, dc in next 3sts, hdc in next st, slst in next 2sts] rep across until next ch-2sp, (slst, ch2, RPM, slst) in ch-2sp} rep 3 times in total, slst in next st, [slst in next st, hdc in next st, dc in next 3sts, hdc in next st, slst in next 2sts] rep across until next ch-2sp, slst in next ch-2sp, ch2, RPM, slst in third slst of the round to close the round. Change to Yarn D in final st. Turn. (76sc, 4ch-2sp)

Round 10: 2slst in ch-2sp, ch2 (counts as a st), {dc in next 3sts, hdc in next st, sc in next 3sts, hdc in next st, [clamshell spike, hdc in next st, sc in next 3sts, hdc in next st] rep across until 3slst remain before next ch-2sp, dc in next 3sts, (hdc, ch2, RPM, hdc) in ch-2sp} rep 3 times in total, dc in next 3sts, hdc in next st, sc in next 3sts, hdc in next st, [clamshell spike, hdc in next st, sc in next 3sts, hdc in next st] rep across until 3slst remain before next ch-2sp, dc in next 3sts, hdc in next ch-2sp, ch2, RPM, slst at the top of ch2 to close the round. Turn. (84sc, 4ch-2sp)

Round 11: Rep Round 2. (92sc, 4ch-2sp)

Round 12: 3slst in ch-2sp, {slst in next st, hdc in next st, dc in next 3sts, hdc in next st, slst in next st, [slst in next 2sts, hdc in next st, dc in next 3sts, hdc in next st, slst in next st] rep across until next ch-2sp, (slst, ch2, RPM, slst) in ch-2sp} rep 3 times in total, slst in next st, hdc in next st, dc in next 3sts, hdc in next st, slst in next st, [slst in next 2sts, hdc in next st, dc in next 3sts, hdc in next st, slst in next st] rep across until next ch-2sp, slst in next ch-2sp, ch2, RPM, slst in third slst of the round to close the round. Change to Yarn E in final st. Turn. (100sc, 4ch-2sp)

Round 13: 2slst in ch-2sp, ch3 (counts as a st), {dc in next 2sts, hdc in next st, sc in next 3sts, hdc in next st, [clamshell spike, hdc in next st, sc in next 3sts, hdc in next st] rep across until 2slst remain before next ch-2sp, dc in next 2sts, (dc, ch2, RPM, dc) in ch-2sp} rep 3 times in total, dc in next 2sts, hdc in next st, sc in next 3sts, hdc in next st, [clamshell spike, hdc in next st, sc in next 3sts, hdc in next st] rep across until 2slst remain before next ch-2sp, dc in next 2sts, dc in next ch-2sp, ch2, RPM, slst at the top of ch3 to close the round. Turn. (108sc, 4ch-2sp)

Round 14: Rep Round 2. (116sc, 4ch-2sp)

Round 15: 3slst in ch-2sp, {hdc in next st, dc in next 3sts, hdc in next st, [slst in next 3sts, hdc in next st, dc in next 3sts, hdc in next st] rep across until next ch-2sp, (slst, ch2, RPM, slst) in ch-2sp} rep 3 times in total, hdc in next st, dc in next 3sts, hdc in next st, [slst in next 3sts, hdc in next st, dc in next 3sts, hdc in next st] rep across until next ch-2sp, slst in next ch-2sp, ch2, RPM, slst in third slst of the round to close the round. Change to Yarn B in final st. Turn. (124sc, 4ch-2sp)

Round 16: 2slst in ch-2sp, ch3 (counts as a st), {dc in next st, hdc in next st, sc in next 3sts, hdc in next st, [clamshell spike, hdc in next st, sc in next 3sts, hdc in next st] rep across until one slst remain before next ch-2sp, dc in next st, (dc, ch2, RPM, dc) in ch-2sp} rep 3 times in total, dc in next st, hdc in next st, sc in next 3sts, hdc in next st, [clamshell spike, hdc in next st, sc in next 3sts, hdc in next st] rep across until one slst remain before next ch-2sp, dc in next st, dc in next ch-2sp, ch2, RPM, slst at the top of ch3 to close the round. Turn. (132sc, 4ch-2sp)

Round 17: Rep Round 2. (140sc, 4ch-2sp)

Round 18: 2slst in ch-2sp, ch2 (counts as a st), {dc in next 3sts, [hdc in next st, slst in next 3sts, hdc in next st, dc in next 3sts] rep across until next ch-2sp, (hdc, ch2, RPM, hdc) in ch-2sp} rep 3 times in total, dc in next 3sts, [hdc in next st, slst in next 3sts, hdc in next st, dc in next 3sts] rep across until next ch-2sp, hdc in next ch-2sp, ch2, RPM, slst at the top of ch2 to close the round. Change to Yarn C in final st. Turn. (148sc, 4ch-2sp)

Round 19: 2slst in ch-2sp, ch3 (counts as a st), {hdc in next st, sc in next 3sts, hdc in next st, [clamshell spike, hdc in next st, sc in next 3sts, hdc in next st] rep across until next ch-2sp, (dc, ch2, RPM, dc) in ch-2sp} rep 3 times in total, hdc in next st, sc in next 3sts, hdc in next st, [clamshell spike, hdc in next st, sc in next 3sts, hdc in next st] rep across until next ch-2sp, dc in next ch-2sp, RPM, slst at the top of ch3 to close the round. Turn. (156sc, 4ch-2sp)

Round 20: Rep Round 2. (164sc, 4ch-2sp)

Round 21: 2slst in ch-2sp, ch3 (counts as a st), {dc in next st, [dc in next st, hdc in next st, slst in next 3sts, hdc in next st, dc in next 2sts] rep across until next ch-2sp, (dc, ch2, RPM, dc) in ch-2sp} rep 3 times in total, dc in next st, [dc in next st, hdc in next st, slst in next 3sts, hdc in next st, dc in next 2sts] rep across until next ch-2sp, dc in next ch-2sp, ch2, RPM, slst at the top of ch3 to close the round. Change to Yarn D in final st. Turn. (172sc, 4ch-2sp)

Round 22: 2slst in ch-2sp, ch2 (counts as a st), {sc in next 3sts, [hdc in next st, clamshell spike, hdc in next st, sc in next 3sts] rep across until next ch-2sp, (hdc, ch2, RPM, hdc) in ch-2sp} rep 3 times in total, sc in next 3sts, [hdc in next st, clamshell spike, hdc in next st, sc in next 3sts] rep across until next ch-2sp, hdc in next ch-2sp, ch2, RPM, slst at the top of ch2 to close the round. Turn. (180sc, 4ch-2sp)

Round 23: Rep Round 2. (188sc, 4ch-2sp)

Round 24: 2slst in ch-2sp, ch3 (counts as a st), {dc in next st, hdc in next st, slst in next 3sts, hdc in next st, dc in next st, [dc in next 2sts, hdc in next st, slst in next 3sts, hdc in next st, dc in next st] rep across until next ch-2sp, (dc, ch2, RPM, dc) in ch-2sp} rep 3 times in total, dc in next st, hdc in next st, slst in next 3sts, hdc in next st, dc in next st, [dc in next 2sts, hdc in next st, slst in next 3sts, hdc in next st, dc in next st] rep across until next ch-2sp, dc in next ch-2sp, ch2, RPM, slst at the top of ch3 to close the round. Change to Yarn E in final st. Turn. (196sc, 1ch-2sp)

Round 25: 2slst in ch-2sp, ch1 (doesn’t count as a st), sc in ch-2sp, {sc in next st, [sc in next st, hdc in next st, clamshell spike, hdc in next st, sc in next 2sts] rep across until next ch-2sp, (sc, ch2, RPM, sc) in ch-2sp} rep 3 times in total, sc in next st, [sc in next st, hdc in next st, clamshell spike, hdc in next st, sc in next 2sts] rep across until next ch-2sp, sc in ch-2sp, ch2, RPM, slst in first sc of the round to close the round. Turn. (204sc, 4ch-2sp)

Round 26: Rep Round 2. (212sc, 4ch-2sp)

Round 27: 2slst in ch-2sp, ch3 (counts as a st), {hdc in next st, slst in next 3sts, hdc in next st, [dc in next 3sts, hdc in next st, slst in next 3sts, hdc in next st] rep across until next ch-2sp, (dc, ch2, RPM, dc) in ch-2sp} rep 3 times in total, hdc in next st, slst in next 3sts, hdc in next st, [dc in next 3sts, hdc in next st, slst in next 3sts, hdc in next st] rep across until next ch-2sp, dc in next ch-2sp, ch2, RPM, slst at the top of ch3 to close the round. Change to Yarn A in final st. Turn. (220sc, 4ch-2sp)

Round 28: 2slst in ch-2sp, ch1 (doesn’t count as a st), sc in ch-2sp, {sc in next st, hdc in next st, clamshell spike, hdc in next st, sc in next st, [sc in next 2sts, hdc in next st, clamshell spike, hdc in next st, sc in next st] rep across until next ch-2sp, (sc, ch2, RPM, sc) in ch-2sp} rep 3 times in total, sc in next st, hdc in next st, clamshell spike, hdc in next st, sc in next st, [sc in next 2sts, hdc in next st, clamshell spike, hdc in next st, sc in next st] rep across until next ch-2sp, slst in first sc of the round to close the round. Turn. (128sc, 4ch-2sp)

Then, repeat Rounds 5 – 28 until desired length.

NOTE: If you want to follow my color pattern then work:

Rounds 28 – 30 with Yarn A,

Rounds 31 – 33 with Yarn B,

Rounds 34 – 36 with Yarn C,

Rounds 37 – 39 with Yarn D,

Rounds 40 – 42 with Yarn C,

Rounds 43 – 45 with Yarn E,

Rounds 46 – 48 with Yarn B,

Rounds 49 – 51 with Yarn C,

Rounds 52 – 54 with Yarn D,

Rounds 55 – 57 with Yarn E,

Rounds 58 – 60 with Yarn A,

Rounds 61 – 63 with Yarn B,

Rounds 64 – 66 with Yarn D,

Rounds 67 – 69 with Yarn E,

Rounds 70 – 72 with Yarn B,

Rounds 73 – 75 with Yarn C,

Rounds 76 – 78 with Yarn D,

Rounds 79 – 81 with Yarn E,

Rounds 82– 84 with Yarn A.

When you have the desired length, I’d recommend that you end on either a repeat of Round 6 or Round 9 or Round 12 or Round 15 or Round 18 or Round 21 or Round 24 or Round 27, so you finish with a fabulous scalloped edge.

Fasten off yarn, weave in all ends and block your blanket.

If you have any suggestions or have detected any mistakes, please feel free to email me at mycrochetory@gmail.com