C2C shamrock blanket crochet pattern
Want a fun, festive crochet project that’s perfect for St. Patrick’s Day? This C2C shamrock blanket crochet pattern features a bold shamrock design worked using the corner-to-corner (C2C) method.
Made from four rectangular panels and joined together to form a cozy square blanket, this project is structured, manageable, and great for seasonal decorating or kid-friendly gifts.
Quick answer: C2C shamrock blanket crochet pattern
This C2C shamrock blanket crochet pattern is an advanced beginner–friendly project made with worsted weight yarn and an I-9 (5.5 mm) crochet hook. The blanket is constructed from four rectangular C2C panels that are sewn together and finished with a border. The finished size is 30 x 30 inches (76 x 76 cm).
What is corner-to-corner crochet (C2C)?
Corner-to-corner crochet (also called C2C) is a technique where you crochet diagonally instead of in rows. The project is built using small blocks made with ch 3 + 3 dc, starting in one corner and growing diagonally until you reach the widest point of the blanket, then decreasing to finish the opposite corner.
C2C is especially popular for crochet blankets because it works up quickly and makes color changes easy—perfect for fun designs like this C2C shamrock blanket.
Why you’ll love this pattern
- Festive shamrock design – Perfect for St. Patrick’s Day decorating
- C2C panel construction – Crochet manageable sections, then join
- Advanced beginner friendly – Uses basic C2C stitches and color changes
- Kid-friendly size – Great as a small blanket, lap throw, or décor piece for kids’ spaces
- Seasonal and giftable – Ideal for classrooms, kids, or holiday displays
This pattern is a great fit if you enjoy structured C2C blankets that work up one panel at a time and feel easy to keep organized.
Free C2C shamrock blanket crochet pattern details
Ready to start crocheting your shamrock blanket? Below you’ll find everything you need to know before you begin, including the skill level, materials, yarn colors, gauge, finished measurements, and helpful notes.
Skill level
Advanced beginner. This C2C shamrock blanket uses the corner-to-corner (C2C) crochet method and includes color changes. If you’re comfortable making basic C2C blocks and following a graph or written color chart, this pattern will feel very approachable.
Materials needed
- Crochet hook: I-9 (5.5 mm)
- Yarn: Worsted weight (#4) in white, red, orange, yellow, green, blue, and purple
- Yarn needle: Used to weave in ends.
- Scissors: Use these to cut yarn and fasten off.
- Stitch marker(s): Helpful for holding panels in place while seaming.
Finished size
The finished shamrock blanket measures 30 x 30 inches (76 x 76 cm). This square size works well as a small throw, lap blanket, or festive St. Patrick’s Day décor piece for kids’ spaces.
Gauge
8 C2C blocks = 5.5 inches (14 cm)
(Each C2C block = ch 3 + 3 dc.)
Crochet abbreviations
- dc = double crochet
- sc = single crochet
- hdc = half double crochet
- ch/chs = chain/chains
- st/sts = stitch/stitches
- sl st = slip stitch
Pattern notes
- This blanket is made using the corner-to-corner (C2C) crochet technique.
- You can follow either the graph or the written instructions for color changes.
- Each C2C block is made with ch 3 + 3 dc.
- Ch 6 to start a new row, and ch 3 to start each new block.
- Rows worked in the ↙ direction are right-side rows.
- Rows worked in the ↗ direction are wrong-side rows.
- This pattern is written in US crochet terms.
New to C2C? Start with my video tutorial
If you’re new to corner-to-corner crochet, I recommend starting with my beginner-friendly C2C video tutorial. It walks you through the basic C2C block, plus increases and decreases, using a small practice panel before jumping into larger projects.
C2C shamrock blanket crochet pattern instructions
Make the shamrock blanket using the graph or the written instructions below.
Graph
Download the shamrock blanket graph.
Written instructions
↙ Row 1: white x 1 (1 block)
↗ Row 2: white x 2 (2 blocks)
↙ Row 3: white x 3 (3 blocks)
↗ Row 4: white x 4 (4 blocks)
↙ Row 5: white x 5 (5 blocks)
↗ Row 6: white x 6 (6 blocks)
↙ Row 7: white x 7 (7 blocks)
↗ Row 8: white x 8 (8 blocks)
↙ Row 9: white x 9 (9 blocks)
↗ Row 10: white x 10 (10 blocks)
↙ Row 11: white x 11 (11 blocks)
↗ Row 12: white x 12 (12 blocks)
↙ Row 13: white x 13 (13 blocks)
↗ Row 14: white x 14 (14 blocks)
↙ Row 15: white x 15 (15 blocks)
↗ Row 16: white x 16 (16 blocks)
↙ Row 17: white x 17 (17 blocks)
↗ Row 18: white x 18 (18 blocks)
↙ Row 19: white x 19 (19 blocks)
↗ Row 20: white x 20 (20 blocks)
↙ Row 21: white x 21 (21 blocks)
↗ Row 22: white x 22 (22 blocks)
↙ Row 23: white x 23 (23 blocks)
↗ Row 24: white x 24 (24 blocks)
↙ Row 25: white x 9, red x 2, white x 14 (25 blocks)
↗ Row 26: white x 13, red x 5, white x 8 (26 blocks)
↙ Row 27: white x 8, red x 6, white x 13 (27 blocks)
↗ Row 28: white x 13, red x 7, white x 8 (28 blocks)
↙ Row 29: white x 7, red x 9, white x 13 (29 blocks)
↗ Row 30: white x 13, red x 11, white x 6 (30 blocks)
↙ Row 31: white x 5, red x 12, white x 9, red x 2, white x 3 (31 blocks)
↗ Row 32: white x 3, red x 3, white x 8, red x 13, white x 5 (32 blocks)
↙ Row 33: white x 5, red x 14, white x 6, red x 5, white x 3 (33 blocks)
↗ Row 34: white x 3, red x 6, white x 6, red x 14, white x 5 (34 blocks)
↙ Row 35: white x 6, red x 14, white x 4, red x 8, white x 3 (35 blocks)
↗ Row 36: white x 5, orange x 7, white x 4, orange x 14, white x 6 (36 blocks)
↙ Row 37: white x 6, orange x 15, white x 3, orange x 5, white x 8 (37 blocks)
↗ Row 38: white x 10, orange x 4, white x 3, orange x 14, white x 7 (38 blocks)
↙ Row 39: white x 7, orange x 14, white x 2, orange x 4, white x 12 (39 blocks)
↗ Row 40: white x 13, orange x 4, white x 1, orange x 14, white x 8 (40 blocks)
↙ Row 41: white x 8, orange x 14, white x 1, orange x 3, white x 15 (41 blocks)
↗ Row 42: white x 16, orange x 3, white x 1, orange x 13, white x 9 (42 blocks)
↙ Row 43: white x 10, orange x 16, white x 17 (43 blocks)
↗ Row 44: white x 18, yellow x 16, white x 10 (44 blocks)
↙ Row 45: white x 11, yellow x 15, white x 19 (45 blocks)
↗ Row 46: white x 14, yellow x 5, white x 1, yellow x 14, white x 12 (46 blocks)
↙ Row 47: white x 13, yellow x 21, white x 13 (47 blocks)
↗ Row 48: white x 13, yellow x 21, white x 14 (48 blocks)
↙ Row 49: white x 16, yellow x 20, white x 13 (49 blocks)
↗ Row 50: white x 13, yellow x 19, white x 18 (50 blocks)
Corner: Start decreasing on both ends
↙ Row 51: white x 19, yellow x 18, white x 12 (49 blocks)
↗ Row 52: white x 12, green x 22, white x 14 (48 blocks)
↙ Row 53: white x 12, green x 24, white x 11 (47 blocks)
↗ Row 54: white x 10, green x 25, white x 11 (46 blocks)
↙ Row 55: white x 10, green x 26, white x 9 (45 blocks)
↗ Row 56: white x 9, green x 26, white x 9 (44 blocks)
↙ Row 57: white x 8, green x 26, white x 9 (43 blocks)
↗ Row 58: white x 9, green x 26, white x 7 (42 blocks)
↙ Row 59: white x 6, green x 27, white x 8 (41 blocks)
↗ Row 60: white x 8, blue x 26, white x 6 (40 blocks)
↙ Row 61: white x 5, blue x 26, white x 8 (39 blocks)
↗ Row 62: white x 8, blue x 11, white x 1, blue x 14, white x 4 (38 blocks)
↙ Row 63: white x 4, blue x 25, white x 8 (37 blocks)
↗ Row 64: white x 7, blue x 11, white x 1, blue x 13, white x 4 (36 blocks)
↙ Row 65: white x 4, blue x 24, white x 7 (35 blocks)
↗ Row 66: white x 7, blue x 10, white x 1, blue x 12, white x 4 (34 blocks)
↙ Row 67: white x 3, blue x 13, white x 1, blue x 10, white x 6 (33 blocks)
↗ Row 68: white x 6, purple x 9, white x 2, purple x 12, white x 3 (32 blocks)
↙ Row 69: white x 3, purple x 12, white x 1, purple x 9, white x 6 (31 blocks)
↗ Row 70: white x 5, purple x 9, white x 2, purple x 11, white x 3 (30 blocks)
↙ Row 71: white x 4, purple x 9, white x 3, purple x 8, white x 5 (29 blocks)
↗ Row 72: white x 5, purple x 7, white x 3, purple x 9, white x 4 (28 blocks)
↙ Row 73: white x 4, purple x 8, white x 4, purple x 6, white x 5 (27 blocks)
↗ Row 74: white x 6, purple x 3, white x 6, purple x 8, white x 3 (26 blocks)
↙ Row 75: white x 3, purple x 7, white x 15 (25 blocks)
↗ Row 76: white x 15, purple x 6, white x 3 (24 blocks)
↙ Row 77: white x 3, purple x 5, white x 15 (23 blocks)
↗ Row 78: white x 15, purple x 3, white x 4 (22 blocks)
↙ Row 79: white x 21 (21 blocks)
↗ Row 80: white x 20 (20 blocks)
↙ Row 81: white x 19 (19 blocks)
↗ Row 82: white x 18 (18 blocks)
↙ Row 83: white x 17 (17 blocks)
↗ Row 84: white x 16 (16 blocks)
↙ Row 85: white x 15 (15 blocks)
↗ Row 86: white x 14 (14 blocks)
↙ Row 87: white x 13 (13 blocks)
↗ Row 88: white x 12 (12 blocks)
↙ Row 89: white x 11 (11 blocks)
↗ Row 90: white x 10 (10 blocks)
↙ Row 91: white x 9 (9 blocks)
↗ Row 92: white x 8 (8 blocks)
↙ Row 93: white x 7 (7 blocks)
↗ Row 94: white x 6 (6 blocks)
↙ Row 95: white x 5 (5 blocks)
↗ Row 96: white x 4 (4 blocks)
↙ Row 97: white x 3 (3 blocks)
↗ Row 98: white x 2 (2 blocks)
↙ Row 99: white x 1 (1 block)
Adding a border
Join your green yarn to one of the corners.
Round 1: Ch 1. Work 2 sc in each C2C block space around. In each corner, work (2 sc, ch 2, 2 sc).
Round 2: Ch 2. Make 1 dc in each stitch along the blanket edges. In each corner, make (dc, ch 2, dc).
Finishing
Weave in your ends. Block if desired.
Frequently asked questions
What is the finished size of the blanket?
The finished blanket measures 30 x 30 inches (76 x 76 cm).
What skill level is this pattern?
This pattern is best for advanced beginners who are comfortable with the basic C2C stitch and changing colors.
What yarn and hook do I need?
You’ll need worsted weight (#4) yarn, an I-9 (5.5 mm) crochet hook, scissors, and a yarn needle for weaving in ends.
How is the blanket constructed?
The blanket is made from four rectangular C2C cactus panels that are sewn together, then finished with a border.
Is this a good project for kids or classrooms?
Yes. The smaller size and festive shamrock design make this a great St. Patrick’s Day crochet project for kids, classrooms, or seasonal décor.
Can I change the colors?
Absolutely. You can customize the colors to match your décor, use traditional green shades, or work with yarn you already have.
More free crochet blanket patterns
Looking for another blanket to crochet next? I share a growing collection of free crochet blanket patterns, including seasonal designs, kid-friendly motifs, and C2C panel blankets that are fun to make and easy to customize.
Whether you’re crocheting for a holiday, a child’s room, or a cozy handmade gift, these blanket patterns are designed to be approachable, flexible, and satisfying projects you’ll enjoy from start to finish.
Let’s connect!
I’d love to see what you’re making! Share your finished project and follow along for more free crochet patterns and tutorials.
📌 Don’t forget to pin this pattern for later!
Happy crocheting! 🧶
— Melissa