Q.cold temps for purple fountain grass
We live in eastern Washington and typically have below freezing winter temps. Do we need to lift our fountain grass for the winter? What is the max low temp in winter?
It is hardy to about 20F. But, if the temps there got lower than that, there is a chance the roots survived if the ground did not freeze. I would give it a few weeks to see if the roots start to grow new leaves. If you do not see any growth in a few weeks, it is likely dead.