posted 7 months ago
My mom bought one of those in the 70's.....they work well, ask me how I know. Had a name, 'Hula Hoe', pretty sure.
No need for super sharp, they work below soft surface and really are for just disrupting/tearing the weeds (or unwanted/needed nature's medicine) as they get established.
If you think about it, sharpening with a file beveling from the top down would make the blade a bit self sharpening as the bottom of the hoe wears away. In hard ground, sharpening from the bottom up would keep the keen edge away just a bit. Doubt it matters.
For hard ground, we weld hard facing on the top of backhoe tooth or bucket edge, bottom wears away faster tooth stays sharp.
Just because you are not able to imagine or do something, does not mean that I can't or that it in fact cannot be safely done.
Necessity is the mother of adoption.