Hi, try this and a few posts below: Modular Tree
Or in less code speak: How to make objects Emit Perpendicular to Surface?
Edit: While the above would snap the particles onto the faces you probably don’t want to rotate them according to these face normals as flora mostly grows against gravity.
It would be easier if each particle wasn’t so wide at the base as this results in the floating you’ve pictured. I’d try different particles that are pointed / narrow at the base or at least make it only one bush / root per particle.