Difficulty growing grass in shade

[HeresLookingatEuclid]

One side of the garden is very shady.The grass is patchy and pulls up when mown.
In the past I have re seeded the area with seed for shaded areas.
Last year I re turfed.I have also used lawn feeds.
It looks green in summer if left long.Then dies off and goes mossy.
At the moment there are two large patches of soil with a bit of grass in which cats are now using as a loo.I want to discourage this.
I am thinking of either:
a)extending the border,putting in shrubs and using bark or stones on top
b)getting fake grass on that side only
c)growing poppies,grasses,wildflowers there(in a border).
d)paving the area.
The garden is a rectangle shape with a straight path down the middle.8 fence panels long 4 panels wide
My favourite idea is the poppies and wildflowers.

Any suggestions?thanks.

I have exactly what you describe in my garden and I have ended up extending and creating new beds .
I've chosen shade loving plants and I've come to think that these are easier than the plants I have in sunny positions as they need less care when it actually is hot and sunny .

I have found forget me nots very useful ! Maybe aquilegia - though I'm not succesful with it .
I won't list my boring suggestions as there are loads of shade loving plants .

Thanks, I love forget me nots.I have grown them in a sunny position in a pot before.
Hopefully it will look better with bigger borders.
I will shape the other side of the garden too for balance.

A border with shade-loving plants is probably the best way to go, your idea of wildflowers & poppies etc is unlikely to work well, as they would need sun, which that side doesn't get. You might have a better chance with shade-loving woodland flowers, as they like those conditions.