to add a little variety to the green areas I added a coat of soil ground to surround it, and so the blending between grass and rock will look better
not much more can be done for the valley grass I’m afraid, as the topology is perfectly smooth in those areas. that’s where I expect the textures and different ground types to give a helping hand 
and so concludes today’s adventure. I don’t know when I’ll have time to touch this again but at least I hope it insipires someone :o