My heads do very well growing but when I harvest them there are a lot of small black spots on the white flowers. I do not know what this is or what causes it.I have heard of "black rot" but when you scratch off the spot it is only on the surface. Can this be my problem and if so how can I prevent it next year? Please reply. Thank you
My heads do very well growing but when I harvest them there are a lot of small black spots on the white flowers. I do not know what this is or what causes it.I have heard of "black rot" but when you scratch off the spot it is only on the surface. Can this be my problem and if so how can I prevent it next year? Please reply. Thank you