Fun idea, but I can see a potential problem when the time comes to mow. I think the glowing rocks need to be contained somehow. Or maybe use larger painted rocks to line a walkway and just plan to use an edger for trimming the grass.
plant top of pineapple in pot. I did this about 5 months ago and thought it didn't work, but I went to through away the what I thought was dead pineapple plant and it is very much alive and healthy. This actually worked so far.