Thanks, never knew what those files are for.
I simplified the input. I realised I could just copy the modifier, no need to put several flower patches into one modifier. I know there are quite some node enthousiast out there that can go really nuts with stacks and stacks of (shader) nodes, but this is all quite new for me.
@theluthier is this what you have in mind for the homework for week 2?
Weight painting might still make more sense in the end because it gives a bit more control in the final scene. This setup is good for a variation of flowers in a field, but not on the exact edge of a stream like reed. This is however quite easy to implement into any scene.

