Root Rot Learn more Overwatering Learn more Underwatering Learn more Watering Potted Rosemary Learn more Poorly Drained Soil Learn more Pruning Into the Wood Learn more Pest Pressure Learn more Frost Damage Learn more Excessive Heat Learn more Not Enough Sunlight Learn more Acidic Soil pH Learn more High Humidity Learn more Powdery Mildew Learn more Lack of Pruning Learn more Too Much Nitrogen Learn more Overcrowded Plants Learn more