babka, it could be too much water, Jim

That IS possible. It is planted in mini fir bark, so the water goes straight thru. But, (BIG BUTT) I've been watering the hell out of it this summer because most of the hostas (all in containers)seem to like that, and "Someone" here keeps extolling the virtues of constant water, water, water. I did have a problem with gnats and had to begin waiting until the top 1/2 inch dried out. Hope I haven't damaged my baby with too much moisture.

Jim, have you seen this happen on any other hostas? I have new ones related to BME this year...Holy and Frosted Mouse Ears, as well as Cat & Mouse. They've been getting the same watering (all mine are in containers) but no leaf curling is evident in any of those.

-Babka

Do you have hard water?
Do they get leached with rain water sufficiently to avoid salt build up?

BTW, I have BME in the stream in constant water, just went out in the dark with a flashlight to see if the leaves are curled up, they are not.

I have 150 or so varieties growing in constant water reservoirs without any apparent problem.

well bme is a mutation of blue cadet so maybe your bme is mutating into something new?

Well of course I have hard water... we don't get ANY rain from March to Dec. I flood the plant each time I water, so I don't think there is a salt build up. It would show in the leaves, as it does in my Jap. Maples, of which I have many, large ones.

I don't think it is mutating to something new, as the leaves are all the same, just turning under. This is the only hosta that is doing this. When I water, I water them all. When I fertilize, I fertilize them all. When I apply insecticide, I do it to them all, when I apply fungicide, I do it to them all.

Do any other hostas exhibit this behavior...bending back under themselves? NO others of mine do this. I have about 65 varities all in pots. Curious.

-Babka

Curling mouse ears...

You wrote, "Do any other hostas exhibit this behavior...bending back under themselves?"

Yeh, mine usually do right before they die. They turn brown, and you can see it on the edges. Look closely at this dead mouse ear...bent backward...this one had a piecrust edge.
{{gwi:1096222}}
LOL, Don

I LOVE it!!!!!!!

-Babka

I have believe it is cultural and water is the only thing I can come with. Because it is the only one then that seems to be ruled out. I think BME is a tet? and they do have thicker leaves, etc.

I seldom believe it is soil but since you have ruled out so many things then repot, BIG BUTT I doubt you will see anything this year.