Just grass, nothing more, nothing less. This is a high resolution, more exactly 5000 x 500 px image available both in png and psd. The psd file contains only one layer (the grass). It was made using the brush tool and the path tool, the background is transparent.
Because you may have a project where you need a large background, I made this image larger. Anyway, download it and use it the way you want to:
View full size in PNG
Resolution: 5000 × 500 px
File format: PSD, PNG
File size: 2.6 MB