Ask-a-Dave's-Gardener: What is wrong with my Hosta, 1 by Keyo

Keyo wrote:
This hosta has been in this location for years. In the spring it grows lush and healthy but late summer it changes to what you see in the picture. This is zone 5b and the plant is in morning sun near my house foundation. However I also have hostas in other locations of the yard mostly shade areas with the same condition to a lesser degree. I do have rabbits and chipmunks and squirrels.. and deer, oh and a groundhog.