spathes on peace lilies are green

Question

The peace lilies are on a bright porch, but no direct sunlight and have a lot of spathes, but they are never white.

Answer 1

Here is an article that discusses this phenomenon:

http://www.flowershopnetwork.com/blog/peace-lily-blooms-green-white/

Here is an article on the care of peace lilies that will also be helpful. The better you follow this care plan the more likely you will get a white flower:

https://www.gardeningknowhow.com/houseplants/peace-lily/peace-lily-plants.htm

Happy gardening!