Posted: 13/01/2014 at 19:01
Always best to wait until spring before cutting any grasses back. However I cut some in autumn...deschampsias, for example. I still have miscamthus looking good but will cut in next couple of weeks. Calamagrostis Karl Foerster and Overdam not long cut back.
I would NEVER burn grasses. Ever.
Hackonechloa I recently hand brushed to leave clean bases. Carex of all types are tough so cut any time. Stipas I cut down in very early spring but with gigantea I am aware of new shoots that will make my flowering stems in the summer. Elymus magellanicus should be cut back in spring but I do this in autumn. I prefer cutting back to combing out because a nice clean base is left. Imperata is cut back during winter for me but best in spring. Pennisetums left till spring too. Panicums ditto. Festucas in their second year I always dig up and divide in late winter.