Foliage Radius for 2 separate objects

Hello! I made 2 types of trees and i put them on folliage.After that I noticed that some of the trees are colliding.I changed the Paint radius to both of the trees to 500.Now the trees of the same type are not colliding but the different types collide between them. http://imgur.com/a/BHa6M How can i make the radius to work for both types.Thank you in advance!

Has this issue been resolved?
Because if it has, I would like to know.

If it hasnt, it would be great to get a comment from someone on here or one of the other posts about this issue.

Thanks