"David Hare-Scott" wrote
Billy wrote:

Add pulverized egg shells (put in blender with some water) to your
lawn. Egg shells breakdown slowly, so you won't get a quick response,
but they will break down eventually.

Get serious. Ted already has enough goofy advice. If the lawn is no
bigger than 3m square and he has 5 years to wait this is a good idea.

Grin, I do save up the shells to amend a small container but I'm not sure it
really does much. More of a science experiement for the fun of it. That
container is used for spinaches and such.