welcome to GoY Charles1

Can you give some information as what you want answering?

Welcome from me also, Charles1!
I.e., what is "curly grass"? And what sort of winter do you mean?

It would be a good idea to add your state to your . this is so that folk answering your questions will know what kind of climate you have and therefore what advice to give you.

I find that curly grass is actually Curly Wurly corkscrew rush, and grows in Zone 4b. To find out whether this is you Google US hardiness zone map and you will find info on growing it if you search for Corkscrew Rush care.