Leaf spots

Often, affected leaves turn yellowish green and fall off, although the plant usually survives. The problem is caused by a fungus that spreads via spores in wet or humid conditions. To control leaf spot, avoid watering your hydrangeas from overhead, and again, remove and destroy diseased plant parts.

Why does my hydrangea have brown spots on leaves?

Brown Spots on Hydrangea Leaves

In a home landscape, brown spots on the leaves are usually caused by a fungus or bacteria. In most cases, the fungus or bacteria does not threaten the life of the plant, but the spots can be unattractive. These spots usually appear annually toward the end of the summer and fall.

How do you treat spots on hydrangea leaves?

Whether it is Cercospora or Anthracnose, the remedy is to treat the hydrangeas with a copper fungicide, usually in a spray form. I use Espoma Copper Soap, which you spray on the leaves. No matter which type of copper fungicide you use, follow package directions and know that you will have to stay on top of it!

Why do the leaves on my hydrangea look burnt?

All hydrangeas will turn brown if they wilt too many times in hot weather. Water these shrubs deeply every few days in the heat of the summer (note that hand watering isn’t deep enough) and mulch around plants to hold moisture in the soil longer.

Should I cut off Brown hydrangea leaves?

The new growth is tender and more vulnerable to frost damage. Brown, mushy hydrangea flower buds do not develop into flowers and should be cut back. Leaf spot fungus causes brown spots on the leaves of hydrangeas and is usually caused by excessive watering on the leaves of the hydrangea.

What does anthracnose look like on hydrangeas?

Anthracnose causes cankers, which look like sunken areas with raised margins. These can grow large enough to encircle, or girdle, the plant’s branches and stems, killing them. New growth near the infected area may come in deformed or crooked, giving branches a gnarled or crooked appearance.

What’s wrong with my hydrangea flowers?

If your hydrangea blooms are turning brown too soon and quickly petering out, they likely need more water. Ditto if your flowers wilt during the day and don’t bounce back at night. To confirm, look for brown spots on leaf edges. To fix, deeply water hydrangeas once a week.

How do you get rid of brown spots on hydrangeas?

Natural remedies for leaf spot in hydrangeas include spraying infected leaves with compost tea, liquid kelp, garlic oil or hydrogen peroxide. Compost tea can be made by filling a burlap bag or old pillowcase with compost and placing it in a 5-gallon bucket of water for three days.

When do you spray fungicide on hydrangeas?

The manufacturer recommends applying this fungicide during early propagation. However, there can be some discoloration in the blooms of your hydrangeas if you apply the fungicide during the flowering season.