I'm trying to picture what a landscape tie is vs a regular 4x4. Do you have a pic? Also, do you just sprinkle the crushed oyster shells around the perimeter?A couple of other ideas....I use 4x4 landscape ties around my pens....another idea is crushed oyster shells(not the stuff for egg shells)...have herd of folks putting a layer ontop of their bulbs to keep the squirrels out....any critter trying to dig through would end up with lacerated paws.....just a thought...