Giant Peace Lily
I had this Giant Peace Lily for about 6 years. A happy plant, but I have under watered it a few times. I repotted it maybe twice over the time I had it. We just moved to a new apartment about 3 months ago. I sprinkled a few ball fertilizers for pot plants on top of the soil around the same time. The leaves slowly turned silver and over the period of 3 months they turned white. Almost like chlorophyll was bleached out. Only top side of the leaf is affected, inside side of the leaves remains green. I have pruned a few leaves but then other leaves started to be affected. Could it be pH or nutrition problem? Please help, as I need to save this plant. I searched Internet and found nothing. Thank you in advance. Genia.
It appears to me that the leaves are suffering from to much light.
I would move the plant to a different location.
Also Peace Lily are quite sensitive to over fertilization.
Here is a link with more information.