

added lines to make out that it wasnt one big bush lol

then realised my pallet has way to light for my grass to take
so i changed the pallet to fit my grass well

(still working on the stump but i wanted to no your thoughts on the upper tree)
its the best one i have made i think lol
Old one:

Its definitely an improvement. Good job.
Try adding leaves to it, it has a flat, almost gradiented looking texture. I would try making more use of that dark shade youve got in there to define the leaves. definitely rework the light source to be more..leafy.