Foilage help

Hey dude So i am having a problem in my Foilage setting. You can see the speedtree on unreal video here

Now as you can see in their video they just add different tree with one foilage. You see i dont wana buy the speedtree or even try it because i have built my own tree meshes. But the problem is that How do i create the random tree placing in one foilage like seen in the video.

Please help me. :smiley:

nvm i did some google and found that there was no way but to make the size differ xD