If you’re joining us for the Mosaic Halloween Blanket CAL 2025, you’re in for a treat (no tricks here!). Section 9 is here, and it’s one of my favorites — a pair of bubbling cauldrons worked in mosaic crochet. When I think of Halloween, witches and potions instantly come to mind. So of course this blanket had to include a cauldron or two! Who knows what’s brewing inside them?

Growing up in the 1980s, I was often dressed as a witch for Halloween. Back then, costumes usually involved a black bin bag, half a tin of hairspray, and neon eyeshadow that could stop traffic. Those memories are exactly what inspired me to bring a little witchy magic to this blanket section.

About This Mosaic Crochet Pattern

This free mosaic crochet pattern is part of the Halloween Mosaic Blanket CAL, hosted by Jamie of Remington Lane Crochet. The cauldrons are worked using the overlay mosaic crochet technique.

Overlay mosaic crochet may look complicated, but don’t let the finished effect fool you. Once you start working the stitches, you’ll quickly see how straightforward it is. With just basic stitches, an understanding of which are the front and the back loops and simple repeats, you can create incredible detail. Just like these cauldrons bubbling away in your blanket!

Yarn and Color Choices

For my version of the cauldrons, I used two shades of Paintbox Simply Aran yarn in purple. The colors worked beautifully together and gave a bold but slightly magical finish.

Jamie’s version for the crochet along uses 3 weight (DK) yarn so is much lighter (and the section works up to be slightly smaller). She used black for the cauldrons and a vibrant green for the background, which gives a strikingly spooky Halloween vibe. Both versions show how versatile this mosaic crochet pattern can be depending on your color choices.

About the Halloween Mosaic Blanket CAL 2025

The Mosaic Halloween Blanket CAL runs to 23rd October 2025, with two new sections released each week. By Halloween, you’ll have a completed blanket full of festive, spooky fun!

You can follow along section by section with the free pattern charts on each designer’s blog, or if you prefer everything in one place, you can grab the Halloween Mosaic Blanket CAL eBook. The eBook includes all of the charts and written instructions in one handy download.

• 👉 Visit the Round-Up Post Here
• 👉 Get the Complete CAL eBook Here

Pattern Specifics

Skill Level: Confident Beginner / Intermediate (familiarity with basic crochet stitches recommended)

Materials Used:

• I used Paintbox Simply Aran yarn (or any #4 weight aran yarn) – this yarn is available in dk weight too! However, the crochet along used Stylecraft Special DK yarn in black and apple green.
• 5mm crochet hook
• Scissors
• Tapestry needle

Gauge: Not crucial for this section, but aim to match your blanket’s existing gauge for consistency.

Pattern Notes:

• This is an overlay mosaic crochet pattern worked from right to left on each row.
• You always work with the right side facing you.
• Each row is worked in one color, and yarn is cut at the end of each row unless otherwise specified.
• You change colour at the end of each row.
• Stitch multiple is 48 + 3 – If you are following with the Halloween Mosaic Blanket CAL, your blanket will have 195 stitches.
• Single crochet stitches are worked in the Back Loop Only of the previous row unless otherwise noted.
• All front loop only dc stitches are made in the front loop of the stitch two rows below.
• If you are making the crochet along blanket do not weave in your ends at the end of each row as the envelope border will hide them.
• The cauldrons chart is included below to guide you through the section.

Free Cauldrons Mosaic Crochet Chart

Below is the free chart for Section 9 of the Halloween Mosaic Blanket CAL. Work row by row following the overlay mosaic technique. Don’t forget to share your progress — I love seeing your bubbling cauldrons come to life!

The written instructions for this patter are only available in the e-book option.

** This is a free pattern chart on the Sunflower Cottage Crochet blog. If you are reading this anywhere else it is stolen content. Please do not copy and paste any part of it or print this pattern out. Please bookmark this page and use the website to work up your pattern. This helps my small business greatly as it provides a little bit of ad revenue which will in turn will allow me to continue to create free content for you!**

Chart Key:

Final Thoughts

Whether you’re brewing up spooky potions or just cozy vibes, this mosaic crochet pattern is a perfect addition to your Halloween blanket. I can’t wait to see your versions — will you go for a traditional witchy black and green, or mix it up with magical purples like I did?

Make sure to share your progress in the CAL group and tag me on social media with your cauldrons. Let’s keep this witchy magic bubbling right up to Halloween!