What happens when plants collide?

Yo ho ho! Ahoy me hearties and fellow buccaneers and buccaneeresses (?)
Shiver me timbers!
I was just wondering what happens when our plants collide. The plant in the middle (an alpen? ), seems to be getting crowded out by the carpets either side. Should I dig it up? I may find some pieces of eight
If I do remove it, what will happen when the carpets meet? Will they mingle with each other, or just stop there?
Any help is always appreciated me ship mates! Ayeeee.

 

I think the one in the middle is a heather? Or a self sown evergreen of some sort? Two choices, really:
1.Take the heather out and let the other two carpets fight it out.
2.Leave the heather and cut back the carpets on either side to let it have room. I don't think you'll kill them. However, the heather eventually might if left in situ.

Your call. Personally, I prefer the pleasant carpetty look of that blue-green sedum and the other thing (maybe an aubretia?) to the scrawny, gaunt dullness of a heather which may eventually spread into a big plant. But you may differ.

Better check it really is a heather first.

 

Ooooo arghhh shipmates
Ahhh yes, I think it is a heather actually. I might be confused because the guy was on about alpens for rockeries.
I wasn't sure if you could buy anything to put between them. A bit like a door bar in my lounge.
I will dig the heather out, and trim the carpets. The carpet on the left is pratia pendunculata
I bought it to help suppress those Epilobium obscurums (spelling).
Thanks to you both as always