Crinum Lily

I do have several crinums in my yard (zone 11) and love them. However, they've developed red splotches on the leaves. Is this leaf spot...Read More and if so what is the recommended treatment? Or is this a sign of nutrient deficiency. Most of my plants get full sun and in fact the only plant not afflicted is in the backyard and gets partial sun.
Thank you.

Zone 8b, Sam Rayburn Lake, east TX
My Crinum Scabrum is currently blooming today, April 22-06 in a 23" pot. I do need your sugge...Read Morestion on how to deadhead. Do I remove bloom above or below small bean-size bulb immediately below blossom?
Thanking you in advance for your comments. Sunbonnet Sue

This old fashioned crinum lily is a low maintence plant that produces lovely pink and white stripped blooms about the size of an Easter L...Read Moreily that have the most wonderful fragrance! The tall bloom stalk stands about 18 - 24 inches above the abundant foilage and holds several blooms at a time! These will produce several flower stalks during the warmer months with the majority of blooms coming in the spring and fall. These lilies will multiply by producing bulbs underground as well as from the seeds that form after the blooms.