I researched this on the forum already, but the former post failed to answer my doubts.

I planted several Mexican Feather Grass plants this early summer, and although they had a pitiful dry look at the nursery, I was assured they would green up. Typically, I have seen the grass looking 'dried' out, but that is the characteristic of the grass.

However, I found that some of the grass contains very few green shoots, and I can easily pull clumps out from the soil. The plants have also not grown visibly. I have kept them well watered, and a few shoots (of the same grass type) I received from a friends garden transplanted very well, and is much greener and have grown since I got them, and they are receiving the same amount of watering.

Weather has been varied, day temps between 80 - 100 degrees this summer.

Is this root rot perhaps?