It’s hard to say for sure what the root issue is without knowing where you’re growing. Hostas naturally die back with the arrival of cooler temperatures in the fall, so you could be seeing that. Unless you live in a dry area, hostas don’t normally need extra water once they’re established, so if you are already getting regular rain, you may be overwatering. Especially at this time of year, when hostas aren’t actively growing, they can be susceptible to too much water. Luckily, they’re hardy and don’t have trouble bouncing back in the spring!
It’s hard to say for sure what the root issue is without knowing where you’re growing. Hostas naturally die back with the arrival of cooler temperatures in the fall, so you could be seeing that. Unless you live in a dry area, hostas don’t normally need extra water once they’re established, so if you are already getting regular rain, you may be overwatering. Especially at this time of year, when hostas aren’t actively growing, they can be susceptible to too much water. Luckily, they’re hardy and don’t have trouble bouncing back in the spring!