By Canalhopper
Denbighshire,
United Kingdom 
What is this plant, please?
This is a self set plant. It grew under the bird feeder and I think it must have grown from something out of the bird food.
As you can see, I have cut it down, because it hasn't flowered, except for one purple spray.
6 Oct, 2018
Answers
Thanks Bamboo.
My reason for asking is, if it's a plant it can go on the compost, if it's a weed it will go in the green bin.
(Yes, I know a weed is a plant too.....!)
7 Oct, 2018
Whatever it is, it has a lot of seedheads on - if you remove the flowered stems, you can put the rest in the compost.
7 Oct, 2018
It looks vaguely like an Artemisia or wormwood - but they don't have purple flowers and are highly unlikely to be included as seeds in bird food.
7 Oct, 2018