Doing some weeding last weekend..kinda remembered the commercial...rod with handle like a water valve shut off,couple twisted points on the bottom..stick it in and twist(aww,teenage years
).
So took a beer break,spied my antique bit and brace(odd shaped hand power drill)
The bits are 12"-18" long,inch or more diameter.
Grabbed my battery drill,managed to fit it in the chuck..well ..close enough.
Drilled the base of the root(some grow really deep,grow back if you don't get it all).
Kinda/sorta worked,but kept clogging up,needed to be more coarse/spread out?
So now I have a project for the weekend..need a longer,thicker shaft(don't we all) so I don't bend over,and just a couple spirals on it.
Here at work we have the paddles for mixing paint,and cement/mud mixers,but flat on the bottom,no way to really modify it.
Thinking maybe 1/8" rebar and old spoon welded to the bottom,wood dowel with giant wood screw?
Tried my sawzall with 18" pruning blade,shook my dentures out.
So what ya got,pop a few oat sodas and see what ideas you can come up with.(I do think they have a made one on Amazon,but that's cheating,didn't look.