241 Moss + Rust

I have now got the rust shards transforming into moss.

Using a noise texture I have gotten an effect where the moss appears in areas which get larger, as if they were growing. Rather than the materials slowly blending together.

However I am a bit stuck on what to make the surrounding areas, espically the 'floor' where the main shards will collide into. I would like to use a muddy or natural ground texture as this coincides with the transformation from man made to natural. Although I think that the color pallete might clash.

4646489