Red Anthurium Flowers Turning Brown. Place your plant in bright indirect sunlight not direct sun feed once a month during active growth with a high phosphorus fertilizer and water once a week with six ice cubes or half cup of water. What most people assume is the red waxy flower is not the plants flower.
A couple of weeks ago I noticed some brown. Sunlight is beneficial to the growth of the flower. Both too much and too little water can cause anthurium to lose their flowers but too much water can cause root rot and kill your plant altogether.
Bacterial ooze brown slime will be present if cuts are made into the stems of highly infected plants.
The red heart-shaped flower is a modified leaf called a spathe or bract. When leaves or flowers are wilting or turning yellow or brown cut them off with sharp shears to ensure the plant devotes more energy to retaining its healthy growth. Its better to provide too little than too much plant nutrition. It receives indirect bright light misting every morning and water it once a week.