i'd sew them in 4 patches and put white sashing between and for the border.

Definitely narrow black sashing would really set off those very pretty blocks. Love, love, love all those florals/fabrics.

I would a sashing around each block.

Whatever you do with these blocks, they will make a beautiful quilt.

I did a quilt using small squares,then I used a small seam binding all around the squares. I gave it to my mother.

I would make squares and then put black sashing in between.