Q.Time to replace purple fountain grass (Atlanta, GA)???
Why is my purple fountain grass still not growing in Atlanta, GA (end of May)?
Certified GKH Gardening Expert
You are on the border (8a) of its hardiness zone (9 and higher) so if you did not provide extra winter protection, it wouldn't come back in your 8a zone.
If it has been coming back, you may have had milder winters. In any case, it sounds like it is time for a replacement.