What have I done?

[Smoothieyummy]

Please help to ID this.

And also I read somewhere that I need to dehead and prune after the flowers died, so I basically just cut the stalks off. Please tell me that was right and I haven’t killed my plant.

Photo here

I have these - cant remember what they're called!!

Heuchera?

Looks like a Bergenia. As far as know you need to remove the flower stalk but doing will cuss no harm

www.rhs.org.uk/Plants/Search-Results?query=Bergenia

Begenia for sure.

Otherwise known as elephants' ears. Or was that just in my family?

Bergenia or elephant ears. I never did anything to mine, they just thrived on neglect luckily!

Yes Bergen is, and you were right to remove the dead flower stem. Does no harm and makes it look better

They're tough as old boots!

Maybe ask what the lovely pink bush in the background is?

Elephants ears or Australian cowslips. They are really quite difficult to damage, short of digging them up! Very useful ground cover plants on all sorts of soils and shade.

Felicity looks like a Japanese azalea

Ooh thanks