in a new layer add a border to the piece of grass
in a new layer add shadow with light brush, then apply gaussian blur
in a new layer add clouds (please find in the source)
step 6 of 8
in the top of the layers paste the original image of this contest (thanks mqtrf), obviously you cut it out before you paste.
Add a new hue/saturation layer for this image:
All (0, -39, +5)
Greens (-172, -100, +100)
step 7 of 8
In a new layer paint with green color and in low opacity all the vegetation in the base of the spade/rose, set the layer to Color.
Add a new layer in the top and paint another cloud from the previous brushes with low opacity again.
step 8 of 8
In the last step 5 adjustment layers to the whole document:
1.-Gradient map:
colors (#290a5a-#ffe99d)
set to soft light, op. 35%
2.-Black and white:
159,143,-17,88,-4,-43
set to soft light, op. 48%
3.-Selective color:
Black (0,+2,+3,-10)
4.-Color Balance:
shadows (+5,-1,-8)
midtones (-3,0,+5)
highlights (0,+1,-8)
5.-Lightroom
(+49,-19)