I would lay it out using a boarder in between and not having it there and see which appeals to your eye.
In my minds eye I think I would go with a thin boarder .
I just love your blocks.
Where did you get the bird fabric?

I love it

I find it very pleasing to look at. Great job!

Me, too!

I think the green sets the stage - it has the shades that you would find in spring and summer leaves. I like the contrast.

I think the green makes the colors pop. I would not add sashing. I really like them the way they are.

It's going to be awesome when done.

I personally would like to see somthing in between to give the blocks a punch but I don't know what color to use accept one that is very sutle in each block.

Love the bird fabric! If I were doing it, (and this is just my opinion) I would put bird fabric sashing between the blocks.

It is kind of dark. How about using a tan background or something similar?