ornamental grass

[paneer]

I think I have something called ornamental grass (gardening newbie). There seems to be clumps of it in one section of my garden. I have dug a few up as I don't really like it. But I've never grown it. Is it like a weed?

[daisydee43]

It won't be ornamental grass as these are grown for aesthetics. It is a weed and needs to be dug up

[mirry2]

It's a devil to get rid of. Just keep going.

[cantspel]

It can spread like weeds and has a pretty extensive root system .
They are a nightmare to dig out as any little bit of root left will regrow into a whole new plant.
Roundup will kill them without damaging the soil but will probably take several applications depending how large the clump is.