Potatoes under a blanket of grass clippings

This year I grew all my potatoes 6 inches deep and covered them with the soil in the raised beds which was enriched with bio-char and rock dust. As they grew I hilled them up with a layer of grass clippings. This made them easier to harvest and I could check on them without disturbing them too much. it worked really well and I will do it again as I have a friend who cuts grass for a living and I get all his clippings.