Tree size problem

When I add tree from the terrain asset pack and from standard assets apart the “Big Tree” they are tiny, smaller than blades of grass even when the height and width are full and variation is full.

Please help, Thanks

I am really new to unity but I had the same problem the other day. what I did was went into my hierarchy, and found where my tree/bush/grass mesh assets where and they were all set at import size of 0.1. just change that to 1.0 or bigger if they still are not large enough and that should fix it for you.

hope this works.