Help! I've murdered my rosa glauca with a strimmer.

I've taken off the bark to ground level so assume that the main branch will die. 3 Or 4 years old from seedling so I was quite fond of it
This is what I have left.
I would appreciate advice on if and how it would be possible to propagate

 

If you have stripped the bark from all the way round the main stem there is little chance it will survive. Give it a year to recover then if nothing happens it will be a case of a replacement unfortunately. It will be worth trying to take some semi hard wood cutting from the remains. Pull them off downwards taking a heel with them, trim the end of the heel, dip in rooting powder, push into a pot of gritty compost around the edge and keep in a semi shaded sheltered cold frame or protected corner. Keep damp, they will take a couple of years to develop a decent root system.
I am no rose expert so I am sure there will be more advice forthcoming.

 

Oh dear. Such is life.

I’d second the cuttings idea. I can see two possibles on that stem in the photo.

When I take cuttings I pull them downwards off the main stem and snip off all but the very top leaves. Instead of rooting powder I do what an old chap used to do when I was a nipper. I put the cut ends into my mouth while I look for a shady, not too dry, not too compacted part of a flowerbed.

I loosen the soil just a little to about a six inch depth, then I then gently remove the cuttings from my mouth (thorns!) and gently push them into the loosened soil. Water with a touch of water and leave for a year.

The more you can ignore/forget about them the better they will grow.

No idea why the old bloke used to put the cuttings in his chops but it definitely works and it’s cheaper than rooting compound.

 

Thank you both. I wasn't sure about how to do the cuttings as this one was a self seeder.
@Tidemark .
@Goldenlily26

 

When I make rose cuttings this time of year I use a humidity dome (fancy name for a clear plastic box) to keep them moist until they root. I follow the rest of the advice above with a gritty compost mix (although I use 50-50 compost and perlite) and place them somewhere bright but out of direct sun (north facing is good).

I would cut the stump below the damage and you will likely see regrowth if it isn't to badly damaged I would think.

 

Update
My neighbour has just informed me That he's going to replace a few fence panels so it would've got flattened anyway.
The good news is that he's also getting rid of an out of control cornus that I've hated for years.

 

Thank you @Thevictorian . I'll do that. It's in a glass of water at the moment

 

I don't know how many cuttings you will be able to take from your rose but there is no reason why you couldn't try each method suggested.

 

Good idea. I'll be awful careful with the stick it in your mouth effort.

 

As it's a seed-grown one not grafted onto a separate rootstock, I think there's a chance that it could regrow from below the damage.
I think given the material you have, I would try softwood/semi ripe cuttings from the leafy bits, and then strip the main branch of leaves and side shoots, trim the ends cleanly and stick it in the ground as a hardwood cutting. Nothing ventured etc.

 

Look what I found when I was weeding!

I think I might have potted few red ants while I was at it

 

Completly recovered and a much better shape than before the altercation with the strimmer

 

There you go, tough as old boots!

 

Where would yer average gardener be without a few old boots? @JennyJB

Tough as old boots thread? Worth a go

 

I'm pleased to hear the old bloke focused on in-transit moisture rather than natural fertiliser.