Leaves turn a lighter shade of green or turn yellow. Young shoots are wilted. Leaves are green yet brittle. Algae and mushrooms are growing. Under-watering Soil is dry.
Older leaves turn yellow or brown and drop off.
Leaves are wilted. Return to top of Watering Trees and Shrubs Tips for efficient watering Apply three - four inches of mulch under the plant canopy. Mulch retains soil moisture and discourages weeds. Do not lay plastic over the soil. Avoid sprinkling tree and shrub leaves with water.