Procedural Foliage Spawner allow overlapping

Hey, I’m using the Procedural Foliage Spawner for my landscape vegetation.

One thing that I could not find out is how to allow multiple foliage to overlap each other.
For example I want to allow that plants are placed below trees. Or that other plants overlap each other to get a more dense and natural look.

Does anyone what settings in the Procedural section? I tried the “collision radius” setting but it’s not satisfying for me.