As long as you put at least 12 inches of soil over the concrete, maybe. But generally speaking, no.

as above bit with plenty of drainage below the soil. But then did you want to raise up the area by 15"

Also, it would probably go brown and die during a typical US summer. How about astroturf? There are some quite realistic ones nowadays.

Yes you can if its artificial turf which might work for you? Oh we posted at the same time VOL.