From what I just read it looks like the best time to prune and/or devide Pampas grass is in the very early
spring before the new growth really starts. I am thinking of planting two of them at the entrance to my driveway. However, when I looked up Bills link on Pampas grass it stated that the grass likes "Full to partial shade". Is this in error as I remember seeing it planted in full sun, not full shade. Claire, I have been to Va.Beach many times and I always love the vast amount of ornamental grasses as well as the HUGE crape myrtles!! Especially over by the Aquarium. Take care.