There is no straight edge when you work with hexagons. Your choice: remove a half hexagon or add a half hexagon to fill in the open spaces along the edge. I chose to fill in the spaces. Thus, the very edge, every other row, has no match. Follow the rows and you can see the pattern in each block. I think this quilt might have benefited from some half triangles in between each block. Too late now.
As I was about to piece the fourth column to the first three, I noticed a mistake. Luckily, I only had to partially rip out the seam between the BA strip and the A strip. I then had to remove the B and A hexagons from the rest of that strip and flip them around. WHEW.
There is another mistake. It is subtle and I did not fix it. Since I don't throw up when I look at it, I figure it isn't that bad. But I do wish that I had noticed it before piecing.
Border decision time. I will add half triangles to the top and bottom to create a straight edge. I think that I will have to use green. I hope I have something that will match. Then I plan to sew on a narrow, white border. I think that the outer border will be a some of the original fabric. No getting around it, this is a Christmas quilt.
When adding the half triangles, it is helpful to know that this is the plan ahead of time. That way, you can sew the half triangles to the hexagons before sewing them into strips. I learned the hard way.