Foliage way too dark

Hi guys

I am having an issue with this fern I have created using Unity's "Tree generator".

My problem is whenever I build the lights, most of the leaves gets extremely dark. I am using a mix of baked light and real-time light. Iam guessing it has something to do with the shadows on the leaves? I have tried playing around with different shadow settings, but haven't seen any changes whenever I build light again.
Its made using only "Frond" as geometry.




Any help would be greatly appreciated!

 

The tree creator adds darkening vertex color (ao) to the created mesh. In the generated material you should be able to lower the influence, but if i remember correctly this may reset when you re-edit the foliage.