This is how I attached the border print and made the design flow uninterrupted around the ecge. This works for patterns that are symmetrical, but would have to be modified for a border that didn't have mirror-image symmetry, like a floral vine or something.
I cut the printed border from both sides of the yardage, giving me two long strips. I left a couple of repeats of the pattern and then formed the first corner, just pinning it at this stage. ( Ideally there should be the same amount of fabric on either side, but I didn't have enough to do it that way.)
I did this with both strips, so I had all the mitres pinned roughly.
I didn't take proper pictures of the corners when I did the border, so I made a simple mitre from scraps to show how it's done.
To get a perfect mitre I marked a 45° line on the fabric, using an easily recognisable part of the pattern as my guide, so I could do all four corners the same. In this case I used the centrre of the sunflower motif as an easy point of reference.
This is what it looks like on the back;
Add the other strip to the other long side, and then join the side borders in exactly the same way. You'll be working with two strips on the side borders, instead of making a pleat you'll be forming a seam between the two strips, but the process is the same.
It's a simple thing to do, but awkward because you're working with all the quilt bundled in your lap or on the table, but the key is to take it slowly and carefully and the result is well worth it.