In years with an early first frost, the leaves go brown quickly and die back to the ground in october.
41+ Brown Spots On Hosta Leaves. Leaf spot colletotrichum sp., alternaria sp., cercospora sp., and phyllosticta sp. Randomly scattered tan to brown spots on leaves in severe cases spots grow together to kill large sections of the leaf virus hosta virus x, tobacco rattle virus, and others.
Browning And Spots On Hosta Leaves Ask An Expert from ask.extension.org
I don't think all of the brown spots can be explained away by rubbing against stuff though. I have two of these big hosta plants on the north side of my home. Can be an outside factor like pesticide.
Bacterial leaf spot is caused by the fungus pseudomonas cichorii.
Tips on hosta care when planted in the ground or in pots. These markings may bleed into the leaf giving it a mottled appearance. Not all brown spots are small, round spots. Over the last few days about 25% of the leaves are showing the brown spots.
