Stump removal: planer question

[SchaefRL]

I need to remove stumps in a larger area I'm clearing. Most of the stumps I'd like to remove are hedge which are killing my mowers. Already bent many blades and cracked a spindle housing.

I'm considering a stump planner for use on my bobcat. I'm concerned that the planner might not work on the hedge since they are wickedly dense.

Anyone used planners on hedge or ash? Thanks