Why Do My Hydrangeas Have Brown Spots On The Leaves?

Why do my hydrangeas have brown spots on the leaves? Brown, tan, yellowish or black spots on hydrangea leaves may be anthracnose. Anthracnose can be fatal to hydrangeas, so prune out dead or diseased plant parts and destroy them. To keep fungal spores from spreading, also remove mulch from the affected area.

How do you get rid of brown spots on hydrangeas?

Spray new leaves with fungicide every 10 to 14 days on bushes that showed damage last year. Spray new leaves as they appear on the plant and as they develop. Spray the stems and limbs and remember to get the leaf underside. Fungicide application on a regular basis may get rid of leaf spot if your issue was severe.

How do you get rid of black spots on hydrangea leaves?

Fill a spray bottle with 1 pint of tepid water and 1/2 tablespoon neem oil and mix well. Spray the stems and tops and bottoms of the leaves of the hydrangeas and discard the solution, as it breaks down within hours after mixing. Neem oil treats black spot and a host of other fungal diseases, such as cercospora.

What is killing my hydrangea leaves?

Since, most ailing hydrangea symptoms are foliar, the number one cause is usually fungal. Leaf spots caused by Cercospora, Alternaria, Phyllosticta or Anthracnose stem from a fungal disease. They are most prevalent in moist conditions, although some occur in warm periods, while others form in cooler temperatures.

How do you treat fungus on hydrangea leaves?

Just spray your hydrangea's foliage according to label directions with a fungicide such as liquid copper, Serenade Disease Control, Daconil, or Immunox. This won't take off the spots already there, but it will prevent any more from forming. Pick up any spotty leaves that have fallen and throw them out with the trash.


Related faq for Why Do My Hydrangeas Have Brown Spots On The Leaves?


Should I cut off scorched hydrangea leaves?

Should I cut off Brown Hydrangea Leaves? If your hydrangea has fungus issues then you should certainly cut off the dead areas. Destroy them so that no other plants are re-infected. In leaf scorch you should consider the overall condition of the plant.


Can you put Epsom salt on hydrangeas?

The short answer is yes it will – Epsom Salts is Magnesium sulfate and Sulfur is the mineral that we apply to the soil to lower the pH. This is also the reason that one will find most container grown hydrangeas in a soil-less mix with pink flowers unless they have been given fertilizers containing Aluminum sulfate.


Why are my hydrangea leaves turning black?

Hydrangeas love water, but excessive irrigation or wet foliage injures plants. Insufficient water causes leaves to turn black or brown. Too much water at the root zone, combined with a poorly draining site, causes root rot that promotes black spots on leaves.


What does an unhealthy hydrangea look like?

If your hydrangea has brown spots or rings on its leaves, there is a good chance that it is infected with hydrangea ringspot virus. Then the leaves of the plant will start to be distorted and rolled, and the growth of the plant will be stunted.


Can I use Miracle Grow on hydrangeas?

Miracle-Gro Water Soluble Bloom Booster Flower Food

There's no need to spend a bundle on plant food. This is an all-purpose blossom booster that's suitable for use on a wide variety of perennial and annual blooming plants, including hydrangeas.


Can hydrangeas take full afternoon sun?

Light Requirements. Hydrangeas grow best in morning sun. Direct sun in the afternoon can burn the large, soft leaves. For this reason, a location where the plant gets some sun in the morning and none the rest of the day is best, but late afternoon sun probably won't hurt the hydrangea if it isn't in direct sunlight.


Do hydrangeas like coffee grounds?

Some gardeners report success in turning their hydrangeas blue by applying coffee grounds to the soil. The coffee grounds make the soil more acidic, allowing the hydrangea to more easily absorb aluminum. In addition, fruit peels, lawn clippings, peat moss and pine needles, are thought to have a similar effect.


Why are my hydrangea leaves turning yellow and brown?

Hydrangea leaves turn yellow due to overwatering, too much direct sunlight, or nutrient deficiency. To fix the yellow leaves, move the plant to a shaded area and drain excess water from the pot. Feed the plant with an iron supplement and nitrogen fertilizer to keep leaves green and healthy.


How do you revive an overwatered hydrangea?

The most immediate fix is to stop watering the hydrangea and give it time to dry out. If overwatering is a recent problem, this might be the only step you need to take. However, hydrangeas don't survive well when their roots sit in water for extended periods.


Can you save a scorched hydrangea?

To revive hydrangeas water them generously, apply a mulch of compost and protect hydrangeas from direct sun and too much wind. Prune back any frost damaged or sun burnt growth to promote healthy growth.


Is Baking Soda Good for hydrangeas?

Baking soda is one of the recognised ways to change the color of hydrangeas. It will alter the pH level in the soil and therefore change the bloom color. White hydrangeas are primarily grown in a neutral soil and to keep them that way, you must transplant them into a soil similar to what your plant has been grown in.


What is the best fertilizer for hydrangeas?

A good all purpose 12-4-8 or 10-10-10 composition will provide all the fertilizing hydrangeas need. Either a chemical source or organic matter can be used successfully. Applying a once a year slow-release chemical formulated for shrubs and trees is the simplest solution to hydrangea care and feeding.


Will leaf spot go away?

Leaf spot makes turf look sick, but does little permanent damage. However, it sets the stage for the more serious melting-out phase of the disease. Water in the morning so turf can dry out quickly. This helps prevent the spread of leaf spot spores.


What does anthracnose look like on hydrangeas?

If the spots border a leaf vein, they can develop an angular shape. If conditions are favorable, whole leaves and flower petals can develop large, irregular, dark brown spots that look like blotches. Anthracnose lesions on a leaf. Photo via Alamy.


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