Lily leaves going crusty brown
I have three asiatic lilies (golden jubilee) in a tub on my windowsill. They bloomed marvelously, however are now without any blooms and have some discoloured, shriveled leaves - the first leaves at the base, and the tips/sides of a few nearer the top. Is this normal, or is it a parasite? I know they're supposed to be grown outdoors, however i don't have a garden and so put them on my very sunny sill as they came from the garden shop. There are three in a 9" (ish) tub, so I had thought they might be a bit crowded? I have been fertilizing with Miracle Grow liquid feed once a week. I've attached a link to an apple icloud page (very reputable, don't worry) with a picture from a few days ago showing blooms and a picture from today.
Any thoughts garden gurus?
Here is a link that might be useful: Apple iCloud Photostream Images