I loved it so much I decided to crochet up my own to add to my grandma's afghan. As I went, I wrote a pattern and got it tested and have decided to post it here for your crocheting goodness. Now, I can't completely claim it as my own since it's from a book, and I used hers as a guide, but please don't claim the pattern as yours, or distribute it without crediting me. This is how I did it, and I felt it'd be nice to share, so please don't go abusing the offer. Please don't repost on your site, and if you do make it, please let me know, either via email or on Ravelry. Enjoy!
WAGON WHEEL GRANNY SQUARE
I used an I – 9 crochet hook; use whatever you need to get 6 inches.
Stitch markers (optional; you’ll be switching yarn every round, so it’s not that necessary, but if you choose to do a single color or different color scheme, it may help.)
Any worsted weight yarn will do in three colors. I used:
C1: Lion Brand’s Pound of Love in Lavender
C2: Caron Simply Soft in White
C3: Caron Simply Soft in Soft Green
sc: single crochet
dc: double crochet
tr: treble crochet
sl st: slip stitch
With C1, chain 4, join in a ring.
ROUND 1: Ch 4 (counts as first dc and ch1) *dc, ch1* 11 times. Sl st to 3rd ch of starting ch4. Finish off C1. (12 ch1 spaces; 12 dcs)
ROUND 2: Join C2 with slip stitch into any ch1 space. Ch6 (counts as first tr and ch2 space), *tr in next ch1 space, ch2* around. Sl st to 4th chain of ch6. Finish off C2. (12 trs; 12 ch2 spaces)
ROUND 3: Join C3 in any ch2 space. Ch3, (counts as first dc) 2dc, ch1 in same space. *3dc, ch1* in each space around. Sl sl to ch3. Finish off C3. (12 ch1 spaces; 12 ch3 clusters; 36 dcs in total)
ROUND 4: Join C1 with sc in any ch1 space. Ch6, sc in next ch1 space (Corner made.) #*ch3, sc in next ch1 sp* twice. Ch6, sc in next ch1 sp# Repeat between # 3 more times ending with a sl st in starting sc. Finish off C1. (4 ch6 corners; 8 ch3 spaces; 12 sc)
ROUND 5: Join C2 with sl st in a ch6 corner space. Ch3, (counts as first dc) 2dc, ch3, 3dc in corner. Corner made. *ch1, 3dc* in each ch3 space around. When you reach the corner ch6 space, # ch 1, 3dc, ch3, 3dc# Repeat between * 3 more times, and between # when you reach the corner. Ch1 then sl st into 3rd ch of starting ch3. Finish off C2. (4 3dc clusters per side)
ROUND 6: Join C3 in corner space with sl st. Ch3, (counts as first dc) 2dc, ch3, 3dc. Corner made. Dc in each dc and ch1 space around. When you reach the corner *3dc, ch3, 3dc*. Repeat around square. Finish off C3. (21 dcs per side)
ROUND 7: Optional. Join C1 in corner space with sl st. Repeat round 6 substituting sc for dc, or any stitch
necessary to give you a 6 inch square.
My awesome, amazing tester craftADDchick tested it, and here is her take:
I love the colors, and how different a darker more wintery palette looks. She used a Bernat worsted, Red Heart Super Saver, and Lion Brand's Vanna's Choice and left off round 7.
Good luck and happy crocheting!