How to Keep Hydrangea Leaves From Burning in Full Sun

Amend the soil around the hydrangeas for better moisture retention. Turn 5 to 6 inches of organic compost into the soil in a 2-foot circle around each plant. The organic matter holds moisture around the roots to nourish the shrubs between waterings and prevent drying.

Water the hydrangeas with 1 to 2 inches of water every three to four days. Water in the morning to prevent mold or mildew growth, and spray the foliage with water as well to perk it up. Don't water at midday when the sun is on the plants, the water drops magnify sunlight and lead to more burning.

Lay 2 to 3 inches of organic mulch over the soil in the 2-foot circle around each plant. The mulch keeps the soil moist and cool during the summer, and keeps the plants from burning. Replenish this mulch layer as it breaks down.