It appears as red spots on leaves, flower stems and flowers. Leaves or stems may be deformed and the bulb may have large, red blotches which rot easily. If red blotch symptoms develop during the growing season, spray weekly or at 10-day intervals with Benlate or Captan to help reduce the severity of the disease. See your county Extension agent if you have questions or concerns about pesticide application and use. Amaryllis are not generally attacked by insects.
Grasshoppers are sometimes a problem on amaryllis grown outdoors.
Failure to Flower Trimming flowers to bloom at a specific time is almost impossible. Rich or highly fertile soil used for potting or planting beds in the garden. Diseases such as red blotch or leaf scorch. Digging and resetting bulbs before they have matured. Maturity may be indicated when the foliage has yellowed and begins to droop.