My pink muhli grass bloomed last fall but this fall it is not blooming, what might be the reason?

Question

I live in zone 7a and grasses are planted in mostly sun and receive water from our irrigation system.

Answer 1

Once mature, they only need supplemental water during drought periods and should be planted away from irrigation systems. I'm wondering if too much water is affecting the roots. Here are the growing conditions for pink muhly grass.

https://www.gardeningknowhow.com/ornamental/foliage/muhly-grass/growing-muhly-grass.htm