I wouldn't normally plan a border this early on in the quilt – I'd prefer the top was finished to lay it against different fabrics and see what looks best.
I don't think we've got time for that here, as most of the fabrics have to come from overseas.
I've mucked around with a few options – see below. The stripe shown is in a green colour-way. It also comes in yellow or blue. We could also substitute the stripe, where it's used as a narrow strip, with short lengths of all the fabrics sewn together.
My vote, though goes to the bottom left or right. I think the small cream border with the larger solid green or blue is cleaner. I was thinking of the blue or green leaf pattern, rather than a solid blue or green.
What is everyone else's favourite? Any other ideas are welcome too!