Q.Relocating And Dividing Pampas Grass
The page states that moving the pampas grass must be done in the spring. https://www.gardeningknowhow.com/ornamental/foliage/pampas-grass/moving-pampas-grass.htm What happens if I move it now early fall, I live in Tacoma Washington.
Certified GKH Gardening Expert
It should be fine if you transplant now. You still have plenty of time for the roots to reestablish before cold weather sets in.