I'd try a variegated green with possibly red or orange. If you do get some, try them out first on some scrap fabric. I've found some threads look totally different on the spool than what they look like stitched on fabric. My avatar is a OBW with tropical birds and the variegated thread I used, I thought would be more yellow green, but it wasn't that way when it stitched out.

I agree with variegated greens and vines and various flower patterns.

Beautiful!!!!!!!!!!!!!!!

Stunning!

Such a great quilt. Shadow /outline stitching would be nice. In a bright color..... :)

Very pretty!

Dreaming,
I just have to say, that is way toooo beautiful to stay a UFO! What gorgeous fabric to use in that pattern! About the quilting, I have two different quilters that I trust to choose the perfect thread and quilting design because I don't have the "eye" for that yet. Please let us see it after it has been quilted!

I like sahm4065's suggestion!

I vote variegated greens. Your quilt is beautiful.

How big are your triangles in the blocks? It is beautiful!!!!