totally agree with the sashing comments. your eyes need to rest between the blocks. One suggestion would be to try several different layouts of the blocks. If possible, spread out the heavily red blocks with the 'calmer' blocks. If you use either thin black or green sashing, maybe audition a thin red or gold border to balance the colors. Your blocks make me want to go thru my stash and look at some of my tropical prints in a whole different way!