A large nos of these appeared all over allotments near my friend .
She grew a couple from seed for me .
We don't know what they are .I've done a lot of googling and am wondering if some kind of escaped/wild african daisy .
The flowers open and close ,I noticed that they had closed the other day about 4.30pm while it was still light .
When the plant is young it looks just like grass .Has flowered in this it's second year .Very tall ,5' ?
Friend says it has a long tap root -
wonder if she'll remain my friend when garden overrun .
Any ideas ?