Leaves suggest not all is well!
Only one pot is showing this way the others (5) are normal colour. Is it a fungal disease? And will the spuds be okay?
Thanks cc
It looks like a deficiency of either nitrogen or magnesium, or both to me.
You could try Epsom Salts or a general purpose fertiliser. Was the growing medium in this bag different to the others?
I put my own compost at the bottom and top up with bought compost.
All will be the same but the bought compost may be a different brand.
I have somewhere some potato fertiliser, which I invariably forget to use.
I have never used Epsom salts, I think I read on here you should add it to comfrey?.
I will order some now.
Are all Epsom Salts the same?
It appears its also used in the bath?