I have no idea who the original creator of the above design is, but I love it, AND I love the monochromatic color scheme.
I figured a good staring place would be to try to locate a pattern for the non-flower squares -- meaning the squares that make up the center of the afghan in the above photo, the ones that look like they have an X going from corner to corner.
And although it's entirely likely that the pattern does exist out there somewhere, I was unable to find it. But working from another photo (see below), I wrote an X Marks the Spot Granny Square pattern that looks similar.
The biggest difference is that the center of the squares in the afghan in the first photo utilize what appears to be a sc/ch sequence around the initial ch ring, which gives the centers a floral look when the next round of "petals" is added. I will try to work that part out in a later revision of my X Marks the Spot Granny Square pattern.
Here is a photo of a finished square made with the version of my X Marks the Spot Granny Square pattern that is found below on this page.
I made it with Lily Sugar & Cream 100 percent cotton worsted weight yarn using an I hook (5.5 mm). Mine came out at 5.75 inches across, although yours may vary depending on your tension, as well as the yarn and hook you choose to use.
Here is a copy of my free pattern.
X Marks the Spot Granny Square pattern
Use whatever yarn weight and hook size that you prefer. As written, in this pattern the ch 2 at the beginning of each round does NOT count as a dc. (If you prefer the initial ch to count as a stitch, ch 3 instead and skip dc at base of ch. At the end of each round, join with a sl to the top of the initial ch 3.)