I let it be, I like it
It's a hypericum
That's what happens Invicta. It has tiny little tubers that break off to form another plant. Plus seeding.
another different phormium
They do M-K- but I don't think they mind that too much. Though maybe in our climate they should mind, being on the surface like that
I think I'd try and ease out half of that clump and spread it a bit but leave some to carry on as they are. I dug up all mine as they were weed infested and it seemed the easiest way forward
M-K- says:My nerines look just like that today.See original post
My nerines look just like that today.
so do mine, I dug a large clump a couple of days ago,
This happens often. Gardening makes you more aware of the seasons and naff weather.
you need someone with greater expertise than I have