Render errors using Hair and Fur Grass Technique

[VTWales33]

Is there a way to increase the density of grass over large spans using the hair and fur technique without having to increase the HAIR COUNT to rediculous numbers? I have been increasing my count to the millions in order to achieve the desired effect, but this causes insane render times and render failure if I try to increase the output image size to over 2000 pixels. Any advice would be appreciated. Thanks.