Duo-Tone Slate Blue & Cream Pinwheel Lattice Bedspread — Free Crochet Pattern

Materials & Required Tools

• Yarn: DK weight (Category 3) 100% premium mercerized cotton yarn[cite: 1, 17]. Mercerized cotton is strongly recommended to preserve crisp geometric contrast between slate blue lace arcs and solid cream diamonds[cite: 5, 17].
  • Color A (Off-White / Natural Cream): ~2,800 meters (~3,060 yards) for central diamond points, outer square boundaries, joining seams, and continuous outer border[cite: 17].
  • Color B (Slate Blue): ~2,200 meters (~2,400 yards) for openwork pinwheel lace fans and pillow accents[cite: 17].
• Crochet Hook: 4.0 mm (US G/6) ergonomic or aluminum crochet hook, or size required to obtain recommended gauge and smooth drape[cite: 1, 17].
• Notions: Tapestry needle for seaming and weaving in ends, locking stitch markers, sharp yarn scissors, measuring tape[cite: 1, 17].
• Blocking Tools: High-density blocking foam mats, stainless steel rust-proof T-pins, and steam iron or garment steamer[cite: 1, 17].

Special Stitch Definitions & Abbreviations

• ch = chain[cite: 1, 17]
• sl st = slip stitch[cite: 1, 17]
• sc = single crochet[cite: 1, 17]
• hdc = half double crochet[cite: 1, 17]
• dc = double crochet[cite: 1, 17]
• tr = treble crochet[cite: 1, 17]
• dtr = double treble crochet[cite: 1, 17]
• inc = increase[cite: 1, 17]
• st(s) = stitch(es)[cite: 1, 17]
• sp(s) = space(s)[cite: 1, 17]
• ch-sp = chain space[cite: 1, 17]
• BLO = back loop only[cite: 1, 17]
• FLO = front loop only[cite: 1, 17]
• picot = ch 3, sl st in 3rd ch from hook[cite: 1, 17]

Instructions

Main Duo-Tone Pinwheel Diamond Square Motif (make ~120 motifs for Queen size)

Each square motif transitions through 8 progressive geometric rounds, starting with a central cream ring, building two slate blue fan lace arcs and two cream solid diamond points, and wrapping in a delicate scalloped picot boundary[cite: 5, 17]. Work each round carefully to maintain exact stitch counts across all 120 blocks[cite: 1, 17].

Part 1: Center Anchor Ring & Hourglass Core (Color A Cream)

1. Round 1 (Center Ring – Color A Cream): With Color A (Cream), make a magic ring (or ch 6, sl st to join first ch)[cite: 1, 17]. Ch 1 (does not count as st), work 16 sc into the ring[cite: 1, 17]. Join with sl st to first sc[cite: 1, 17]. Pull magic ring tail tight to close center core[cite: 1, 17]. [16 sc]
2. Round 2 (Establishing Hourglass Quadrants): Ch 3 (counts as dc), 2 dc in same st, ch 2, skip 3 sts, 3 dc in next st (Cream Diamond Point 1), ch 2, skip 3 sts, 3 dc in next st, ch 2, skip 3 sts, 3 dc in next st (Cream Diamond Point 2), ch 2, skip 3 sts[cite: 17]. Join with sl st to top of ch-3[cite: 17]. Fasten off Color A[cite: 17]. [4 3-dc clusters, 4 ch-2 sps]

Part 2: Slate Blue Fan Lace Arcs (Color B Slate Blue)

1. Round 3 (Initiating Blue Fan Arches – Color B Blue): Attach Color B (Slate Blue) to any ch-2 space between cream clusters[cite: 17]. *In ch-2 sp work [1 sc, ch 4, 1 sc, ch 4, 1 sc] to form base for blue fan arc, ch 3, skip cream cluster; repeat on opposing blue quadrant side[cite: 17]. Fasten off Color B[cite: 17]. [2 blue fan base quadrants]
2. Round 4 (Expanding Blue Radial Radii – Color B Blue): Attach Color B in first ch-4 loop[cite: 17]. *Work 7 tr in ch-4 loop, ch 1, 7 tr in next ch-4 loop (creates ribbed radial fan lines), ch 3; repeat for opposing blue fan[cite: 17]. Join and fasten off Color B[cite: 17]. [14 tr per blue fan arc]
3. Round 5 (Concentric Blue Arc Ribs – Color B Blue): Attach Color B to first tr[cite: 17]. *Ch 5, (sc in next tr, ch 5) 6 times across fan, sc in next tr, (ch 5, sc in next tr) 6 times across second fan section[cite: 17]. Fasten off Color B[cite: 17]. [12 concentric ch-5 loops per blue arc]

Part 3: Cream Diamond Point Expansion & Framing (Color A Cream)

1. Round 6 (Solid Diamond Expansion – Color A Cream): Attach Color A (Cream) to the 3-dc cream clusters from Round 2[cite: 17]. Work [3 dc, ch 2, 3 dc] in corner space to expand the solid cream diamond point, work 1 dc in each st across cream diamond face, ch 3, sc in center of blue fan arc, ch 3; repeat for opposing cream diamond point[cite: 17]. Join with sl st[cite: 17]. [2 solid expanding cream diamond points]
2. Round 7 (Squaring Out Boundary – Color A Cream): Ch 3 (counts as dc), work 1 dc in each st across cream diamond points, placing [2 dc, ch 3, 2 dc] in corner points[cite: 1, 5, 17]. Across blue fan arcs, work (1 dc in ch-5 loop, ch 1) 12 times to bind the open blue lace into a smooth square frame[cite: 17]. Join with sl st to top of ch-3[cite: 1, 17]. [Square geometry finalized]
3. Round 8 (Scalloped Picot Edge – Color A Cream): Ch 1, *work 1 sc in each st across side, working [2 sc, picot, 2 sc] into each corner ch-3 sp; repeat around all 4 sides[cite: 5, 17]. Join with sl st, fasten off Color A, and weave in all loose ends securely[cite: 1, 17]. [Square motif size = ~20 x 20 cm]

Bedspread Assembly

1. Arrangement: Lay out all 120 completed duo-tone pinwheel diamond motifs on a clean, flat surface in a 10 x 12 grid, ensuring all slate blue openwork arcs align with adjacent blue arcs to form large circular medallion rings across the mattress top[cite: 5, 17].
2. Invisible Seaming: Place adjacent squares right sides together[cite: 5, 17]. Using Color A (Cream) yarn and a tapestry needle, whipstitch through the back loops only (BLO) of matching outer edge picot stitches along touching sides[cite: 5, 17]. This joins the motifs seamlessly into a completely flat, flexible grid across the entire blanket face[cite: 1, 5, 17].

Continuous Outer Scalloped Bedspread Border

1. Round 1 (Base Anchor Row – Color A Cream): Attach Color A (Cream) yarn at any outer corner of the assembled bedspread[cite: 1, 17]. Ch 1, work single crochets evenly around all 4 outer edges, placing 3 sc into outer corner points and 1 sc dec in inner seams where motifs meet[cite: 1, 5, 17]. Join with sl st to first sc[cite: 1, 17].
2. Round 2 (Open Mesh Band – Color A Cream): Ch 4 (counts as dc + ch 1), *skip 1 st, dc in next st, ch 1; repeat around entire outer perimeter, working [2 dc, ch 2, 2 dc] into outer corners[cite: 1, 5, 17]. Join with sl st to top of starting ch-3[cite: 1, 17].
3. Round 3 (Multi-Tiered Scalloped Shell Border – Color A Cream): *In corner ch-sp work [5 dc, picot, 5 dc], sc in next ch-sp, *skip 2 sts, work [4 dc, picot, 4 dc] in next ch-sp, sc in next ch-sp; repeat from * continuously around all 4 sides of the bedspread to form the draped scalloped edging[cite: 1, 5, 17]. Join with sl st, fasten off, and weave in all remaining ends securely[cite: 1, 17].

Matching Decorative Pillow Shams (make 2)

Front Sham Panel

1. Join 4 main Duo-Tone Pinwheel Diamond Motifs in a 2×2 square tile formation using Color A (Cream) yarn through back loops only (BLO)[cite: 1, 5, 17].
2. Work Round 7 and Round 8 of the motif instructions around the outer perimeter of the 2×2 block to square off the panel to approximately 45 x 45 cm[cite: 1, 5, 17].

Back Sham Panel

1. Row 1: With Color A (Cream) yarn, ch 57[cite: 1, 17]. Dc in 4th ch from hook and in each ch across[cite: 1, 17]. Turn[cite: 1, 17]. [55 dc]
2. Rows 2–32: Ch 3 (counts as dc), 1 dc in each st across[cite: 1, 17]. Turn[cite: 1, 17]. Fasten off after Row 32 [55 dc per row; panel size = ~45 x 45 cm square][cite: 1, 17].

Sham Assembly

Place front and back panels wrong sides together[cite: 1, 17]. Single crochet around 3 sides using Color A (Cream) yarn, insert a 45 x 45 cm pillow form, and sc across the 4th side to seal[cite: 1, 17]. Finish with the scalloped picot border around all 4 outer sham edges[cite: 1, 5, 17].

Tips for Success

• Maintain Smooth Color Transition Tension: Keep even tension when switching between Color A cream and Color B slate blue so that the hourglass center stays flat without cupping[cite: 17].
• Steam Block Individual Squares: Steam-blocking each square motif to ~20 x 20 cm before assembly flattens the slate blue lace fan arcs, aligns the cream diamond points, and makes row-by-row seaming much faster[cite: 1, 5, 17].
• Weave In Color Ends Early: Fasten off and weave in loose ends at each color switch during motif construction to avoid a tedious finishing workload later[cite: 1, 17].
• Keep Assembly Stitches Relaxed: Avoid pulling joining threads too tightly so that the cream framing seams lie completely flat over the mattress without puckering[cite: 1, 5, 17].
• Choose a High-Definition Mercerized Cotton: A smooth mercerized cotton yarn highlights the graphic contrast between slate blue fan arcs and cream solid diamonds clearly[cite: 1, 5, 17].

Common Mistakes to Avoid

• Skipping Motif Blocking — Unblocked geometric squares pull inward at the blue fan arcs, causing puckered, uneven seams during assembly[cite: 1, 5, 17].
• Carrying Color B Behind Cream — Do not carry slate blue yarn under cream stitches in Round 6; cut and fasten off blue yarn to prevent color show-through[cite: 17].
• Uneven Seaming Tension — Seaming too tightly along the cream outer borders creates rigid ridges instead of a flat blanket surface[cite: 1, 5, 17].
• Mixing Yarn Dye Lots — Ensure all slate blue and natural cream skeins share matching dye lots to prevent noticeable shading differences across the broad background[cite: 1, 17].

Ways to Customize This Pattern

• Terracotta & Cream Palette: Swap slate blue for rich terracotta red yarn to create a warm Mediterranean geometric aesthetic[cite: 1, 5, 17].
• Throw Blanket Dimension: Reduce motif count to 48 squares (6 x 8 grid) to create a cozy living room throw (~120 x 160 cm)[cite: 1, 5, 17].
• Matching Pinwheel Coasters & Trivets: Work single motifs through Round 7 in heavy cotton yarn to craft matching geometric hot pads or table trivets[cite: 1, 5, 17].