Do you have bird seed feeders anywhere nearby @Katie182?
No we don't. It's on our allotment. There's two in our herb/flower bed and one in the adjacent flower bed on the other side of the path. We thought it might have been from one of those mixed bulb packets. The base of it is as thick as my arm! We did plant some cosmos and dahlias but the cosmos never came up...
The squirrels & Magpies are always burying things on our allotment site. Have a look around & see if anyone else is growing something exotic. It still could have come from bird seed, from a garden some way off.
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In the sticks near Peterborough
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
A. powellii (the flower buds will elongate with age) or A. retroflexus ..... they've worked at Kew so know their stuff
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.