For years I've been picking the weeds from between flagstone of a 10' x 10' path/patio. I tried sprigging dwarf mondo grass. Then learned quickly that it wouldn't make it in full sun. What can I propogate, divide, plant etc., that will go to fill in these cracks. Thyme has been suggested. I'd like to be able to maintain just by dropping the mower and maybe some trimming by hand would be ok. Very little foot traffic in this area. Thanks for any suggestions.