Can anyone give me some advice on a stone patio filler that is located primarily in sun all day except in the early AM. Zone 6. I have tried a white creeping thyme that has done well in only one section of the patio and the rest looks like it is beginning to die. I've tried a sedum as well and it just looks like it is struggling. I'm contemplating just going with a turf, but am concerned it will lift the stone. This is an informal stone patio, but we'd like it to have some filler besides sand between the stone. Any help for this newbie would be greatly appreciated.