Well, I am torn. I think it needs either green or gold between the blocks but I also kinda like it with nothing. Thoughts from the group, please.

yes something between.....

I think it needs sashing. What color you need to audition it out. I would not go without sashing on those beautiful fan blocks. You want them framed so the eye will be compelled to flow from block to block and rest on individual fans.

I'm personally a fan of using some green in between the blocks. I think it would really bring out the colors you are using.

I think the gold would be a good choice, however depending on the shade of green that might be good too. Audit them. I would make the sashing very narrow.

I kinda like the thought of golds. They are so elegant!

its very pretty, and I am as stumped as you are about the sashing, sorry

The blocks are beautiful, I would use pink for sashing, lets see some auditioning.

Not sure about the pink but you should try out a few colours just lay a colour under the squares if you don't like it pick another till you do. looking forward the the final results

I think green sashing would be good.
The green or any sashing that you use I would
not have it so overly bright as to take away
from those gorgeous blocks.
Moss green might work.