The symptoms of deformities in Oyster and Phoenix Oyster Mushrooms are similar. Mushrooms will bloom in clusters with 5-15 mushrooms per each cluster. Mushrooms are small, 1-2 cm. Some are bigger but not more than 4 cm. Mushroom caps don’t bloom or spread out. Stalks might form in a single piece or 3-4 of them connected in one piece. Mushroom caps are crooked or rolled out. The other abnormal symptom is found in stalks that are quite long, writhe and without mushroom caps, or the stalks are unusually big with mushroom caps in funnel shape, or in small mushrooms that don’t spread out. The color of mushrooms is either white, soft white or light gray.