Made and counted by Wren —

Flower Granny Square Blanket Pattern With Petal Border

5 mm hook, worsted-weight yarn: granny squares topped with treble crochet petals join into a throw blanket.

IntermediateLevel

10+ hoursTime

5 mmHook

WorstedYarn

Jump to the pattern

About this pattern

A granny square blanket worked with a 5 mm hook: each square starts with 12 double crochets in a ring, gains a granny stitch border with three-double-crochet corners, two rounds of single crochet, then a second-color petal round using treble crochet clusters. Squares join, ends get woven in, and blocking is optional. No stitch or row counts are given for full assembly beyond one square.

This blanket builds from individual granny squares, each starting as 12 double crochets worked into a ring closed with a chain-4 foundation. A granny stitch border (round 1) frames each square with corner sets of three double crochets split by a chain-3, then two rounds of single crochet clean the edges before squares join. A second color layer adds treble crochet petals worked into the border's chain spaces, using two treble crochets together per petal. The count that matters most: 12 stitches close the starting ring, setting every measurement that follows.

The pattern

Written out round by round

Materials

5 mm crochet hook
Yarn needle
Pair of scissors
Yarn in desired colors

Abbreviations

shell = shell stitch

Starting the Square

Make a slip knot and chain 4.

Join to the first chain with a slip stitch to form a ring.

Round 1Chain 2 (counts as first double crochet), and work 11 double crochets into the center of the ring.Join with a slip stitch to the top of the initial chain 2 (you should have 12 double crochets total).

Border

Round 1Granny Stitch Border Work double crochets around the blanket perimeter. In each corner, work two sets of three double crochets separated by a chain of three.Join and cut yarn.

Round 2& 3 (Single Crochet Border):

First Round

Finish off the color (if desired) and weave in ends or work over them.

Change color for the next round if desired.

Round 1Second Round (Petals): Join new color in any chain space.

Round 2Chain 4 (counts as one treble crochet).

Round 3Work 2 treble crochets together in the same space, then chain 2.(2)

Round 4Continue working 3 treble crochets together in each chain space around, chaining 2 between each set, for a total of 12 petal groups.(3)

Round 5Join with a slip stitch to the top of the first set and cut yarn.Third Round (Turning Circle to Square): Join new color between any petals.

Round 6Chain 4 for the first treble crochet and work 2 more treble crochets in the same space.

Round 7Chain 3 for the corner and work 3 more treble crochets in the same space.

Round 8Chain 1, and in each space between petals work 3 double crochets until reaching the next corner.Repeat the corner step and continue with the pattern until reaching the starting point.(3)

Round 9Join with a slip stitch, finish off the color, and weave in ends.

Optional

May do 2 rounds of single crochets in beige or other color.

Attach yarn into the corner space.

Round 1Work three single crochets in corner spaces and one single crochet in each stitch around.For the second round, in the middle stitch of the previous round's corner space, work three single crochets.Join and cut yarn.

Round 2Final Round (Shell Ruffle Stitch Border): Join yarn one stitch over from the corner center.

Round 3Chain one (counts as a single crochet), skip the next stitch.Work five double crochets into the next stitch (corner center).

Round 4Skip the next stitch and single crochet into the following stitch to create a shell pattern.

Round 5Continue this pattern (skip, 5 double crochets, skip, single crochet) all around the blanket.Join and finish off.(5)

Assembly

Step 1Weave in all remaining ends.

Step 2Wash and block the blanket if desired.

Tester's notes

5 mm hook is the only size given; swap sizes only if round 1 doesn't lie flat, and stay consistent across all squares.

12 double crochets must close the starting ring exactly — miscounting here throws off corner alignment on every later round.

Mark the starting chain-2 space on round 1 so it isn't skipped at the join, especially in variegated yarn where stitches are hard to see.

Color changes happen at two points: after the granny border (round 1) and before the petal round; finish off and weave in ends at each swap rather than carrying yarn.

Chain-3 corner spaces (border round 1) need to stay open and untwisted, since single crochet rounds 2 and 3 work directly into them.

Work in progress

Flower Granny Square Blanket Pattern With Petal Border — photo 2

Flower Granny Square Blanket Pattern With Petal Border — photo 3

At a glance

Rounds	17
Parts	4
Level	Intermediate
Time	10+ hours
Hook	5 mm
Yarn	Worsted

Gauge check

After round 1, count stitches: 12 double crochets should sit evenly around the ring with no gaps at the join.

Stitch-count checkpoints

First Round · Round 3: 2 sts
First Round · Round 4: 3 sts
First Round · Round 8: 3 sts
Optional · Round 5: 5 sts

If something looks wrong

The starting ring won't close tightly.: The chain-4 foundation is too loose or the slip stitch join missed a stitch; pull the tail before working round 1, and check that the join sits at the top of the initial chain-2.
Corners look rounded instead of pointed.: The chain-3 between the two three-double-crochet corner sets (border round 1) is uneven or worked into the wrong space; keep both corner groups tight against the chain-3 space, not the stitches beside it.
The petal round pulls the square out of shape.: Treble crochet stitches in the petal round are taller than the double crochet base and can flare if worked too loosely; keep each two-treble-crochet-together snug and check the chain-4 count as the first treble.
Squares don't line up when joining.: Border rounds 2 and 3 (single crochet) weren't worked at even tension around all four sides, changing edge stitch count square to square; recount stitches per side before joining rather than estimating by eye.

Yarn substitutions

Acrylic, worsted weight	Closest match to the pattern's likely gauge; holds the treble crochet petal shape without extra blocking, same 5 mm hook.
Cotton, worsted weight	Stiffer drape, so granny squares sit flatter and corners hold their shape better; petals may need firmer tension, and blocking helps more than with acrylic.
Wool-blend, aran weight	Slightly thicker than worsted, so squares grow larger; move up to a 5.5 mm or 6 mm hook to keep the 12-double-crochet ring from pulling tight.

Original pattern: https://crocheteverything.com/crochet-flower-granny-square-blanket-pattern-to-blossom-into-crochet/

FAQs

Questions

How many squares does the blanket need?

The pattern doesn't state a total; size is set by how many finished squares get joined, so plan the count based on the desired finished dimensions.

Can the border and petal round use the same color?

Yes. Color changes at the border and petal round are both marked as optional in the pattern, so a single color works through all rounds without cutting yarn.

What causes gaps between the double crochet stitches in round 1?

Loose tension on the 11 double crochets worked into the ring center leaves visible gaps; pull the ring closed firmly before starting the round and check that all 12 stitches, including the starting chain-2, sit snug against each other.