Do i chop all my grasses down to the roots?

I have various evergreen grasses such as Ponytail. Should i chop all the plant down to the ground or does the new growth get rid of the old.

 

If they`re evergreen why do you need to cut them down?

 

Not sure about yours but I cut back my ornimental grass in feb as it was looking particulary scruffy and now it is shooting again

 

Hi Pat I have a quite a few grasses and although it does state with some of them to give them a little chop back (although not right down to the roots lol)in spring I have left mine and none of them seem any worst because of it.

All your new growth will replace and covered up the old stuff but if you really want to hack it back a little there should be no harm in it, remember that some of them need dividing evry few years or so too.Hel.xxx.