Weed prints

I have been moving these prints of weeds around on my design wall, but haven't come up with the final version yet. This first photo is of all the OK pieces together.

Some removed and another added.

Perhaps a different filler colour? These permutations are all part of the design process for this piece. I also have a finished size in mind to conform with an entry requirement but will abandon this if I get a better layout for the pieces.