Destroy instanced foliage actors on Event Begin Play?

I am trying to make this actor remove the surrounding foliage once the game begins, I am doing this so it can be much more convenient to place foliage rather than have to tediously place it around every actor. Is it possible?

The problem is, all of the foliage is one actor.

It is possible to loop through the foliage instances and delete them individually, but it might be easier to just paint it on a bit more carefully.