Landscape Grass Type problem

Hi, i have a problem with my material that when i make the landscape grass type , it doesn’t spawn in the map , although i checked my material scripting every time and

i make the scale of the grass large in the landscape grass type large but nothing happen so please help me … i need solution for this … thanks in advance

Though I’m half a year too late, I’d also like to know the answer…

well one issue could be that their grass density is set to zero. actually several things are set to zero.