Can you show the texture and material?
A fix would be to back off the saturation in the albedo texture.
why my tree leaves are horribly green instead of natural dark green. Tree is from speedtree 8 and it was fine in the ST8 but in ue4 it looks very bad. can anybody help?
Considering how “sunny” your level is I think it looks appropriate.
Worse, eh? )
The only other thing I can see, is maybe set those texture params back to their default ( the ones with the yellow ticks ).
I think it does look normal in your first pic, but not the extra green parts…
What was the problem?..
subsurface texture was the main problem. i used the albedo as subsurface and done some changes in the albedo texture. that fixed the problem.
Ah - told ya!.. 
Ok, first thing I’d try is disconnecting that subsurfacecolor. Where does that get you?..
Thank you