Interlocking Block Stitch Blanket Tutorial
Below, I’ll explain how to crochet the Interlocking Block Stitch. This stitch has a beautifully textured and sturdy finish. Because the stitches are worked over previous rows, the fabric becomes thick, warm, and cozy—making it an excellent choice for blankets.
Materials Needed (Blanket Size: 90 × 100 cm)
Yarn
We Are Knitters – The Cotton (Pima Cotton, 100 g / 212 m)
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4 balls – Natural
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2 balls – Aquamarine
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2 balls – Mint
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2 balls – Emerald
Hooks
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5 mm crochet hook
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4 mm crochet hook
How to Crochet the Blanket
Foundation
Start with Aquamarine using a 5 mm hook.
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Chain 154.
(For a different size, start with a multiple of 4 + 2 chains.)
Row 1
Work 1 dc in the 4th chain from the hook and 1 dc in the next chain.
* Ch 2, skip 2 chains, 1 dc in each of the next 2 chains. *
Repeat from * to * until the last chain, then work 1 dc in the final chain.
Row 2
Ch 1, 1 sc in the first stitch, ch 2, skip 2 dc.
* Working over the ch-2 space and into the unworked foundation chains from the row below, work 1 dc in each of the next 2 chains (this encloses the ch-2 from Row 1), ch 2, skip 2 dc. *
Repeat from * to * until the turning chain, then work 1 sc in the top of ch 3.
At the end of the row, change to Natural. Let Aquamarine hang—you will pick it up again two rows later along the side.
Row 3
Ch 3.
* Working over the ch-2 space and into the tops of the dc stitches from the row below, work 1 dc in each of the next 2 dc, ch 2, skip 2 dc. *
Repeat from * to * until the final ch-2 space and sc. Work 1 dc in each of the next 2 dc, then 1 dc in the sc.
Row 4
Ch 1, 1 sc in the first stitch, ch 2, skip the next 2 dc.
* Working over the next ch-2 space and into the tops of the dc stitches from two rows below, work 1 dc in each of the next 2 dc, ch 2, skip the next 2 dc. *
Repeat from * to * until the turning chain, then work 1 sc in the top of ch 3.
At the end of the row, change back to Aquamarine, carrying the yarn neatly up the side. Let Natural hang; you will use it again two rows later.
Rows 5 and Onward
Repeat Rows 3 and 4, changing colors every two rows following this sequence:
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4 rows Aquamarine
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4 rows Mint
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4 rows Emerald
Repeat this color sequence until you have completed three full sets of all three colors.
Final Row
Finish with Emerald as follows:
Ch 1, 1 sc in the first stitch.
* Working over the next ch-2 space and into the dc stitches from two rows below, work 1 sc in each of the next 2 dc, then 1 sc in each of the next 2 dc. *
Repeat from * to * until the end of the row.
Fasten off.
How to Crochet the Border
Switch to a 4 mm hook.
Round 1
Using Natural, work a round of single crochet evenly around the entire blanket.
In each corner, ch 1.
Close with a slip stitch and fasten off.
Round 2
Using Mint, crochet sc in the back loop only of each stitch.
In each corner: 1 sc, ch 1, 1 sc.
Close with a slip stitch and fasten off.
Round 3
Repeat Round 2 using Natural.
Round 4
Repeat Round 2 using Mint.
Round 5
Repeat Round 2 using Natural. Fasten off.
✨ Have fun crocheting and enjoy your cozy Interlocking Block Stitch blanket! ✨
