I am using a group to get more variation in grass stalks as per this tutorial. Unfortunately that tutorial was for a still image so did not cover wind or other force fields.
From various other tutorials I set up a wind force field. If I set the render of the grass to "Path" as can be seen, the effect is very strong.
However, as soon as I change the render to "Group" the wind effect disappears.
While beginning to write this, I noticed a question Why does not wind force field affect grass field made with hair particles?
In that case the user had used an "Object" render and had the same problem. I checked and sure enough, if I change "Group" to "Object", the wind also has no effect.
So my question is: Is there some way to have a hair particle system affected by wind if using object or group render, or is it limited only to path render?
For reference, here are my particle settings: