However, if your Pieris japonica’s leaves turn yellow, it is a sign that something is wrong. Pale leaves can be caused by a number of problems: insects, disease or inappropriate growing conditions. Pinpointing the exact cause of your plant’s pale leaves will take a bit of troubleshooting.Click to see full answer. Also know, why is my Sarcococca yellow?Many diseases other than viruses can cause leaves to turn yellow. Some leaf spot diseases (e.g. rose blackspot) cause the leaves to produce ethylene, a gas that leads to rapid yellowing and leaf fall.Similarly, what does chlorotic mean? In botany, chlorosis is a condition in which leaves produce insufficient chlorophyll. As chlorophyll is responsible for the green color of leaves, chlorotic leaves are pale, yellow, or yellow-white. Chlorosis is derived from the Greek khloros meaning ‘greenish-yellow’, ‘pale green’, ‘pale’, ‘pallid’, or ‘fresh’. Similarly, why are the leaves on my hydrangeas turning yellow? yellowing on hydrangea leaves. Yellowing leaves usually indicates the plant is suffering from a nutrient deficiency. Over-watering can cause yellowing too, and it can exacerbate nutrient deficiencies as nutrients are flushed out of the soil. Most plants survive well with one good soaking per week around the root zone.Why are my evergreen shrubs turning yellow?Poor Irrigation. Too little or too much water causes the leaves of an evergreen shrub to turn yellow and appear stressed. Conversely, under watering also increases stress on a plant, especially during dry periods with prolonged sunlight exposure, causing the leaves to turn yellow.
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