Trouble with the Particle Coordinates for Use in Bonemeal Particle Effects

I'm trying to make it so that a if bonemeal is used on a custom sapling, it will give off the same particle effect as it would bonemealing vanilla saplings, but I can't seem to line it up right. It always spawns a tall stream of particles at one corner of the dirt block its on.

Anyone know the specific set of coordinates to summon particles while bonemealing saplings? I got the right procedure block, just not the right position I want to set the particles to.