I have a plant thats growing in my garden which I think is rather nice. Its approx 1.1m tall at the moment, then pointy leaves with a small purple blue flower. The flower is dying off and is being replaced with a seed sack of some sort.
I would like to know what plant it is and I am planning on keeping it. But, what to do with it over Autumn / Winter.
Pics attached and thanks for you help.