Crocosmia, as for moving them I am not sure.

Someone else should know.

It's Crocosmia, also known as Montbretia and ##@*&. It loves to spread and spread and once established, is just about impossible to control. It will soon die back, and you can dig them up, replant what you want, and carefully throw the rest away. From experience, I know they won't survive a trip through a mulcher/shredder, and can then be added to a compost heap. If grown in a shady area, the orange will become more pronounced.

I confirm that it's montbretia - and very spready. Be very careful about where you put it - a couple of corms will all too soon become a big group and it's almost impossible to get rid of when it spreads to areas where you didn't plant it. It spreads by seed and bits of root left in the soil, and it produces chains of corms that break off when you try to remove it. Then the cormlets left behind give a sigh of relief and grow really quickly to replace the ones you pulled out.

As you can tell, I don't like it, but that's because I've had dealings with it for 20+ years and still haven't beaten it. I'd advise you not to spread it anywhere else in your garden & keep the bit by the fence in the photo under control as best you can. I'd advise you not to put it in the compost - I find it needs to be incinerated on a hot bonfire to get rid of it.

If you really want to transplant some to another site in your garden you could do it whenever you like - Montbretia is almost unkillable.

I lost loads of mine in the harsh winter. especially lucifer and my 2 yellow forms.

I like it as it creates a relaxed feeling, cottagey etc. Easy to transplant but can spread. Looks nice there, creates a bit of height at the back of the border. :)

I agree that it looks nice where it is.

Bulba and I view it as a weed for the reasons Beattie has stated... It does not fit into our garden at all and comes in from he garden next door which gets very little attention!

Thanks to all of you for replying. I must say I didn't realise my newly identified "Montbretia" is perceived as a pest. The clump in the picture has taken a good 10 years to get to the stage it's at. So, for me, I consider it not too rampant & not like a certain Japanese Anenome we had.

Perhaps it might be best to consult "she who must be obeyed" before deciding what to do with it.

Thanks again to you all.