I'm using Blender hair particles for simulating grass and there are two issues.
1) Hair simulation is too slow, even when I set the number to 5 just to check how the grass blades move around. (No there are no Force Fields currently).
2) "Cache" is missing when "Hair" mode is used. This is Blender 2.76b
This means I can neither clear the cache nor bake the animation so I can preview it in the 3d view before so I know everything is fine before running the day-long rendering of the scene.