By Barbarak
North Yorkshire,
United Kingdom 
Unknown .? Grass. I think I asked for an ID of this awhile ago but can't find the question in my archive so could someone please ID again . I didn't plant it, it appeared with the diascia. Thanks
10 Nov, 2019
Answers
yes I also think its a rush but there are quite a few species. it will have been a seed in the compost used to grow the diascia. personally I would remove it unless you really like it.
10 Nov, 2019
What a conundrum? Looks like a hard rush, Juncus inflexus. I'm sure I've seen something similar on soggy, marsh ground; but one for the experts.
10 Nov, 2019