can you put some photos on killjoykxo. A lot depends on size and what it's overgrown with
If it all looks like that it is dying, sorry. Could put up a photo of the bark damage?
I should think if you google gardeners world TV you'll find a contact us or 'send your photos here'
i think that's Stokesia laevis
I'm surprised at a nursery that can't ID its plants without a label
the leaves match the flowers Ladybird and it is invasive if it's happy.
Not many safe sides to weedkillers lissermern
the ones that come up on the compost heap are always best
let the birds get at them,
sounds like a spud to me
If you google potato and look at images you'll probably find one just like yours
Alliums grow easily from seed but the fancy named cultivars will not seed true. Sow them now (or just let them seed). It takes from 2-5 years from seed to flower, the small ones are quick, the larger ones take longer