Admittedly, I didn't work the grass as much as I should, but should illustrate a couple things you can do to improve. The palette could use a little optimizing after I butchered it, too.
One thing to note, don't let the grass distract from your main focus. On the grass avoid using shades that have values equal with your brightest values on the bush. Otherwise they end up competing with each other and you get a super-bright thingy that hurts your eyes.
You'll notice I did use brighter shades on the grass nearer to the bush, but I avoid using the brightest shade you have on the bush, settling for the next closest. To polish it off I might've added a couple more blades leading away from the bush
I edited your bush to get rid of the dark black pixels on the lightest side. By keeping them on the darker side I think the image pops more and better separates the dark/light areas. I felt your old version had a paper cutout feel to it. I also toned down the overall contrast by bringing the darkest black forward a couple shades.
Keep it up, there's been lots of improvement so far and you have plenty more to improve if you want. The grass to me is a weak point right now. You've picked the nicest of the 3, but it needs some touching up and some attention given to the pixels. It's too scribbly right now