I still saw some grayness in the plane, which disappointed me a lot(considering the time it took to render!) so I assigned a lambert with ramp texture(colors of tip and bottom of grass placed at ends of ramp).
Yes, the tree kinda looks sad....I fiddled with the UV layout, smoothed it and gave a better texture to the leaves. May be I should remodel it...
I am in 10th grade, sophomore in high school, but if you don't take me serious, I'll make you.