Do not leave them to rot in your yard, and it is better to throw them as far as possible.eval(ez_write_tag([[250,250],'worldofgardenplants_com-box-4','ezslot_3',109,'0','0'])); If the infection has already occurred and you see visible signs of this disease, then tear off all the damaged leaves and throw them in the trash. First, the spores settle on the lower leaves and then migrate higher.eval(ez_write_tag([[336,280],'worldofgardenplants_com-medrectangle-3','ezslot_11',107,'0','0'])); Below is a list of hydrangea species that can be affected by this disease. Remove damaged leaves at Cercospora leaf spot is a foliar disease that rarely, if ever, kills the target plant. Very common on grapes and strawberries. plants. The disease often affects only part of the plant, and the other part may look undamaged.eval(ez_write_tag([[468,60],'worldofgardenplants_com-portrait-2','ezslot_24',121,'0','0'])); It is difficult to control this disease. If summer rains make … Usually, these spots are irregular and they’re very small. The causes of Virescence are other diseases that cause changes in the plant. Bacterial leaf spot will cause discolouration on your leaves and now and again, it will really murder them. spring, avoid overhead watering, if possible. It is a systemic disease that is spread by a sap in the plant. Petioles are covered with black or dark brown spots and eventually wither with the leaves. On plants, there are spots of different sizes and shapes. Another mistake is excessive watering, avoid it. Most fungal diseases found on hydrangeas cause leaf spotting on the foliage rather than the stems, so I suspect that the white spots could be the eggs of a sap-sucking scale insect called Pulvinaria hydrangeae, or hydrangea scale. The size of the spots is a quarter of an inch or less. At first, there are no signs of the disease. Symptoms consisted of irregular to circular lesions, dark brown in color with gray-white centers and delimited by dark brown borders. Over time, the spots increase and may merge, and they also acquire an irregular shape. clean the whole garden of fallen leaves and dead parts of plants. Cercospora leaf spot is a foliar disease that rarely kills a plant. The most common are fungal diseases that mainly affect the leaves. Red Japanese maples with very dissected leaves are just fabulous plants. This disease most often develops in the shade, so avoid too much shading of the hydrangea. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. As a result of the disease in the plant stops the movement of water to the leaves and petioles. It is unlikely that the plant will die as a result of this disease, but the appearance will be severely damaged.eval(ez_write_tag([[336,280],'worldofgardenplants_com-banner-1','ezslot_1',110,'0','0'])); As in the previous case, the spores of the fungus overwinter on the surface of the earth in plant remains. Strictly follow the recommendations on the label. It is common from summer through fall. The spots first occur on lower, For starters, you might notice black-edged lesions on the leaves of your hydrangea or brown spots that include a yellow tinge around the spot. Most often, the fungus develops on young succulent leaves and petioles. There are many fungal leaf spots that affect many different plants and have different appearances, but the one we are seeing on hydrangeas right how looks like a small tan or whitish dead spot a quarter inch or smaller surrounded by a purple or brown ring. Cercospora leaf spot is an infectious leaf disease that affects smooth, panicle, oakleaf and bigleaf types of hydrangea in Arkansas landscapes and nurseries. As a result, the plant may lose much of its foliage. That is, keep the environment in the garden clean and free of rotten leaves and plant debris. them out of the area. The bacteria Xanthomonas campestris causes spots to appear on infected Hydrangea leaves starting in summer. of Hydrangea. The side effects show in various manners. Mature leaves are more resistant to this disease. Hydrangeas are a Usually, everything happens in the summer, but the results of the fungus begin to become noticeable only in the fall. The surface around the plant should be clean, do not let the leaves rot near the plants. Sometimes the color can be black or purple.eval(ez_write_tag([[300,250],'worldofgardenplants_com-medrectangle-4','ezslot_10',108,'0','0'])); As a result, the leaves become very unaesthetic. The pathogen will rarely … If there is excess moisture, you need to arrange drainage. Pruning should be done with clean and sharp tools. This fungal leaf spot can affect most hydrangeas and is generally an aesthetic issue for homeowners. Also, small green leaves are formed on the flowers. vigorous overall. External signs may be different; the leaves may turn yellow or wither and then fall off. Small, round, brown or purplish spots on hydrangea leaves are common. This virus is very similar to the previous one, and it is also not transmitted by insects or seeds. Most often, spores get on the plant with the help of wind or water drops (rain or watering) that throw them on the leaves. Most often, the spread occurs in nurseries during propagation by cuttings. This is a separate group of microorganisms that are useless to fight. Severely infected leaves often fade to yellowish-green and drop from the plant. Spores of this fungus overwinter in fallen leaves and earth. It is impossible to cure, buy healthy plants, remove infected ones. The disease rarely kills hydrangea plants, but it can cause leaves to drop and look unsightly. Their shape is mostly circular, but on different species of hydrangeas, the spots can change and become rectangular. In COPYRIGHT © 2020 WORLD OF GARDEN PLANTS. This may only be practical on plants that are in residential landscapes. The spots are small that typically measure 1/8 to 1/4 inches in diameter. Spray the plant with an aqueous solution of fungicide. Also, several times a year, clean the area around the plant from fallen leaves and other debris. This site also participates in affiliate programs with other sites and is compensated for referring traffic and business to these companies. Resource used: https://bit.ly/2LhKcZl Plants are usually infected a month or two before spots appear on the leaves. When spring comes and the weather becomes favorable, the wind and rain spread the spores throughout the garden, and they settle on the leaves of plants. They are also effective, but to use them, you need to understand how to work with them and follow all the manufacturer’s recommendations. Since the signs of the disease may become noticeable only at the end of the season, it is recommended to spray the plants in late spring for prevention. Cuttings should be taken only from healthy plants, and a sterile knife or pruning shears should be used. heavy rainfall. 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This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. In bigleaf hydrangea, the spots are typically black/grey, with a brown halo around them. First of all, you may see dark edged injuries on the leaves of your hydrangea or earthy colored spots that incorporate a yellow hint around the spot. Wisteria is a vine plant that has a unique flowering. There are almost no chemical methods. Spores can remain in the ground for many years undamaged. There are many species of these plants, but the... Japanese Maple Red Dragon vs Crimson Queen: 4 Things to Consider Before Making a Purchase. However, in severe cases, it will cause nearly complete defoliation. There have been cases of infection of the following types of hydrangeas: Bacteria often spread from plant to plant through non-sterile instruments during pruning or propagation. Most often, the spread occurs in nurseries. Sometimes this disease affects Panicled hydrangea (Hydrangea paniculata). The bacteria enters the leaves through wounds or the natural openings (stomates and hydathodes). Spray the stems and tops and bottoms of the leaves of the hydrangeas and discard the solution as it breaks. All infected plants must be destroyed. Their color can be different, but most often, they are black. The best conditions for the disease are cloudy and rainy weather. Thiophanate-methyl products work most effectively against Anthracnose. This limpet-like insect also feeds on acers and cherries. Fertilize and water the plants. As a result, they wither and fall off together with the leaves. The leaves turn yellow; usually, the veins remain green, and only the areas between them turn yellow. Various factors can cause chlorosis. The problem is caused by a fungus that spreads via spores in wet or humid conditions. Cercospora is perhaps the most common disease of hydrangea. Cercospora Leaf Spot Cercospora brown spots on hydrangea leaves. Cercospora leaf spot is a common disease that attacks many different plants in our landscape, most noteworthy, the many species of hydrangea. One very common leaf spot on hydrangea is Cercospora leaf spot caused by the fungal pathogen, Cercospora hydrangeae. The main vectors of the disease are thrips. The spots may turn tan or light gray in the center and are surrounded by a brown or purple ring. They are most prevalent in moist conditions, although some occur in warm periods, while others form in cooler temperatures. CLS symptoms include circular leaf spots scattered on the leaves near the base of the plant. Four-lined plant bug Poecilocapsus lineatus. Powdery mildew is markedly different from other fungal diseases due to its white color. Best hydrangeas for a sunny spot Best hydrangeas for a sunny spot. You can find more information on the page About Author. Check with the nursery to make sure you’re buying a You can also beat Powdery mildew with Neem Oil, which is also an organic product that is safe for the environment. Another key difference is that when your hydrangea is infected with Cercospora, you will see spots on the lower leaves first. Proper planting and care of hydrangeas reduce the risk of infection. On the upper part of the leaf, you can notice only pale yellow spots that only eventually become reddish-brown. Spraying plants with milk gives good results in the fight against this disease. Depending on what caused the disease, treatment will be different. You can use chemical control methods, namely Chlorothalonil 720 SC or Daconil Weatherstik. If there is not enough iron, then you need to add this element to the soil. Sometimes you can remove the infected leaves if it doesn’t make your plant look emaciated. The problem is that the main part of the body of the fungus develops on the lower part of the leaf, so it is difficult to notice the disease at an early stage. The results of the disease can be seen in the summer. Leaf Spot Diseases on Hydrangeas. Cercospora Leaf Spot typically appears in late summer and fall. It usually does not destroy the plant, but young plants are at greatest risk. Hydrangea > Leaves > Spots or blotches on leaves. The first thing to do to avoid infection is to plant a hydrangea properly. To control leaf spot, avoid watering your hydrangeas from overhead, and again, remove and destroy diseased plant parts. The fungus spreads through spores that grow on fallen hydrangea leaves. Unfortunately, hydrangeas have a wide list of threats that can harm them. The fact is that such fertilizers can cause the growth of young leaves. issue was severe. You can’t reverse what has already happened. The bushes should always be clean. When the air temperature rises above 68 ° F (20 ° C), it begins to progress. When planting or propagating, use only quality sterile soil. Bacterial leaf spots caused by Xanthomonas In the later stages, the leaves turn yellow and fall off. One such problem is various diseases. Therefore, if your hydrangea has this disease, you need to remove the plant from the yard to avoid the spread it. Also, with a large number of spots, the leaves turn yellow and fall off after a while. The only way to do anything is to reduce the spread of the virus. Next is proper watering, do not water the plants on top of the leaves (overhead). Occasionally, a particularly virulent infestation may mark the leaves with yellow or purple splotches or cause them to fall off. Do not water the plants with too much water.eval(ez_write_tag([[250,250],'worldofgardenplants_com-narrow-sky-2','ezslot_16',117,'0','0']));eval(ez_write_tag([[250,250],'worldofgardenplants_com-narrow-sky-2','ezslot_17',117,'0','1'])); Another important recommendation – you should not feed the plants in the second half of summer, especially do not use fertilizers with high nitrogen content. You can also spread the disease to other plants with non-sterile instruments or watering. Mostly an issue in the landscape than in the greenhouse. However, if the plants are young or you have not noticed the disease in time, then the damage can be significant. In addition, there are chemical control methods, for example, the use of sulfur or systemic fungicides. Hydrangea leaf spot on a mophead hydrangea. Abstract. the air should move freely between the plants. Bacterial wilt is a fairly severe disease that can lead to plant death. Therefore, buy only healthy quality plants from reliable nurseries. Leaf spots caused by Cercospora, Alternaria, Phyllosticta or Anthracnose stem from a fungal disease. older leaves and then move upward. Cut off all infected leaves and throw them away or burn them. At serious infection, under a white coating, there are dark spots as a result of leaves brown and dies. Otherwise, you will create ideal conditions for the development of the disease.eval(ez_write_tag([[468,60],'worldofgardenplants_com-mobile-leaderboard-2','ezslot_12',115,'0','0'])); If an infection has occurred, remove the affected parts of the plant and throw them away from the yard or burn. Affected … This product greatly reduces the number of pathogens in the soil. Leaf spotting on hydrangea is mostly caused by the fungus Cercospora and affects most of this family of plants. It also happens that the hydrangea is affected by several diseases at the same time. Cercospora leaf spot is one of the most common foliage diseases of hydrangeas. Leaves may … However, most often, the spots cover a large part of the leaf, and it turns yellow; after a short time, the leaves fall off. The second type of host is hemlock (Tsuga canadensis or Tsuga caroliniana). When the air temperature approaches 70 ° F (21 ° C), spores begin to develop on the plants. Tan spots with reddish brown borders form on the leaves. Unfortunately, young leaves and petioles of hydrangeas can also fall victim to this scourge.eval(ez_write_tag([[300,250],'worldofgardenplants_com-portrait-1','ezslot_21',113,'0','0'])); Spores of this fungus can persist in the soil for several years. Predictably, leaf spot fungus covers climbing hydrangea leaves and flowers with ugly brown or gray spots. WHAT TO DO ABOUT HYDRANGEA LEAF SPOT. that are going to fall off is not the solution to avoiding leaf spot next year. and is perhaps the most common disease seen on this perennial orna- Spots on the hydrangea macrophylla will sometimes have tan or gray centers with brown or purple border halos. Spray the stems and limbs and remember to get the Often, affected leaves turn yellowish green and fall off, although the plant usually survives. But as the spots continue to slowly enlarge, mostly maintaining a circular shape, they become more obvious. Cercospora leaf spot is a common disease that usually infects when leaves are regularly wet by rain or irrigation. Also, spores can penetrate the buds or internodes and comfortably survive the winter there. and other issues. This fungus, unlike others, does not require high humidity. Since, most ailing hydrangea symptoms are foliar, the number one cause is usually fungal. increasing to irregular patches with a grayish-tan center bordered by purple or For this reason, the name of one variety we are considering today is Red Dragon because leaves remind small flying... Hi I’m Igor. These fungicides are designed to combat this disease. Sign up for our newsletter. After some time on the surface of the foliage appear small spots that emit moisture. The best weather for the development of the disease is dryness and warm temperature. Leaf spots on a hydrangea are caused by the fungal infection cercospora. If needed, protectant fungicides can be applied prior to infection. The bacteria is splashed up onto the leaves from overwintering innoculum in the soil or leaf litter. Practice good sanitation by disposing of all damaged leaves as they fall. This disease is caused by the fungus . The fungus exists in the soil Although Cercospora leaf spot fungus (Cercospora hydrangeae) strikes in spring, its spots typically surface after hydrangeas have passed their peak of summer bloom. Brown marks may also be visible on the stem. The color of the spots is mostly brown, on different species and under different conditions, the color may be different shades of brown. Find more gardening information on Gardening Know How: Keep up to date with all that's happening in and around the garden. INSV is spread by insects. Also, maintain the right balance of minerals in the soil. Bacterial Leaf Spot is also a problem with Hydrangeas. Among hydrangeas, rust parasitizes on Smooth hydrangea (Hydrangea arborescens). bushes that showed damage last year. Cercospora Leaf Spot – this disease is characterized by small, scattered brown spots hydrangea on the surface of your hydrangea leaves. After feeding, the plants become more resistant to infection. Sometimes entire hydrangea leaves will … New fungal spores develop in this white powder, and next year they will spread and settle on new hosts. When pruning or doing other garden work, use a clean and disinfected tool. The flowers turn green, and they begin to produce chlorophyll. So if the spring is dry, the risk of infection is reduced and vice versa. Hydrangea macrophylla, also known as big leaf hydrangea, is an economically valuable ornamental garden plant.From 2016 to 2018, a high incidence of leaf spot disease of hydrangea occurred in Hunan Province of China. Choose only healthy quality plants. brown. When pruning a hydrangea, use sterile instruments. promote spread, with reddish-purple spots that look more angular in appearance. Ideally, in the early stages of disease development, leaves with leaf spot symptoms should be removed from the plants. Bacterial Leaf Spot (Xanthomonas campestris), link to Amethyst Falls vs Blue Moon Wisteria: Must Read Before Making a Decision, link to Japanese Maple Red Dragon vs Crimson Queen: 4 Things to Consider Before Making a Purchase, Remove infected leaves, spray with a fungicide, Anthracnose ( Colletotrichum gloeosporioides, Colletotrichum dematium), Botrytis Cinerea (Botryotinia fuckeliana), Avoid planting in too shade places, use biological fungicides, Powdery mildew (Erysiphe friesii var. Leaf spots caused by a variety of fungi can occur on hydrangea. The wrong amount of nitrogen can also cause chlorosis.eval(ez_write_tag([[250,250],'worldofgardenplants_com-mobile-leaderboard-1','ezslot_9',129,'0','0'])); Some research is needed to pinpoint the causes. These include: You should try and avoid splashing water on the leaves of the hydrangea and instead of water the plant’s base. In the case of an anthracnose infection, the lesions can appear simultaneously throughout the top and bottom parts of the plant. Do not work with plants immediately after watering. plant and as they develop. In the later stages of the disease in the center of the spot, you can see gray mold.eval(ez_write_tag([[250,250],'worldofgardenplants_com-narrow-sky-1','ezslot_14',114,'0','0'])); If the disease has spread to the petioles, they also change color and become pale brown. Spreading can also occur if the plants are placed too close, and during watering or rain, the droplets transfer bacteria from the infected plants to the healthy ones. There are products on the market that are designed to combat this disease. On the contrary, it is more comfortable in cool climates but with high humidity. With severe infection, the hydrangea may die. Usually, the infection occurs during vegetative propagation or after pruning. In the picture, you can see the plant affected by Anthracnose and Cercospora. By: Becca Badgett, Co-author of How to Grow an EMERGENCY Garden. The fungus exists in the soil and is moved onto the plant by overhead watering or rain. It begins as brown or purple spots on the leaves at or near the base of the plant. The circular spots are often small and scattered and usually measure 1/8 to 1/4 inches in diameter. they can decline and defoliate early. There are no effective methods to deal with this virus. Signs are yellow chlorophyll-free circles on green leaves. How to remove black spots / fungus on your hydrangeas. Products containing chlorothalonil or thiophanate-methyl are best suited for this purpose. from leaf to leaf and onto other plants nearby. The first signs of this disease are spots. You can also buy organic fungicides that cope well with Botrytis Cinerea and do not contain chemicals. or two before spots appear on the leaves. Along with most of the leaf spot diseases, it begins as small dark-colored specks on the leaves. leaf underside. Unlike Cercospora, this disease does not require warm weather. Plants should also have free space around them so that the wind dries the leaves after the rain. the soil should not be too moist around the plants. Premature leaf drop can lead to loss of plant vigor and setting of the flower bud. If the disease has developed too much, the plant should be dug up and destroyed. The Cercospora hydrangeae fungus can attack your hydrangeas. Sign up to get all the latest gardening tips! After pruning, spray the wounds with a solution of fungicide. Fungicide Clean the garden from fallen leaves and branches. However, in severe cases it will cause nearly complete defoliation. Spots on the bigleaf hydrangea develop tan or gray centers surrounded by brown or purple halos. Hydrangeas are strong and beautiful plants, but in the process of growing them can appear many problems. In other cases, all the leaves wither on one or more branches, and the rest of the plant remains healthy in appearance. If you have mulched your plants, make sure you use only quality material for this. The water can splash the fungus As a result, the sap flow on the stem deteriorates, and the leaves turn yellow and wither.eval(ez_write_tag([[300,250],'worldofgardenplants_com-leader-4','ezslot_8',123,'0','0'])); The first thing you need to do is try to avoid this disease. ALL RIGHTS RESERVED. Cercospora leaf spot (Cercospora hydrangea) begins as brown or purple spots on the leaves at or near the base of the plant. disease-resistant plant. Hi friends, I have been growing plants for many years and love doing it. 1 of 5. Verticillium Wilt is a very serious disease that can kill a plant, although it rarely affects hydrangeas.eval(ez_write_tag([[250,250],'worldofgardenplants_com-large-mobile-banner-1','ezslot_0',120,'0','0'])); It all starts under the ground. can also occur, particularly on oakleaf hydrangea plants. Most often, it is a lack of iron in the soil, and the second reason may be root rot. With the advent of the warm season, plants become infected. Use clean tools. Cercospora Leaf Spot (also known as Cercospora hydrangea), is typically brown or purple colored spots at the base of the plant. The most common lesion occurs on young succulent leaves and other parts, such as leaf stalks. The disease winters on one host and, in the warm season, migrate to another.eval(ez_write_tag([[300,250],'worldofgardenplants_com-leader-2','ezslot_4',118,'0','0'])); Luckily rust rarely destroys the plant, mostly it all ends with cosmetic damage. There are no chemicals that can cure the plant yet. Because the disease occurs late … Scientists claim that insects do not spread it. of bacterial infections but will not cure the plant. Then spray the plants with a fungicide. On a plant, migration also occurs by rain or watering. mostly caused by the fungus Cercospora and affects most of this family of Natural remedies for leaf spot in hydrangeas include spraying infected leaves with compost tea liquid kelp garlic oil or hydrogen peroxide. Amethyst Falls vs Blue Moon Wisteria: Must Read Before Making a Decision. Fungal causal agent: Phyllosticta sp. and is moved onto the plant by overhead watering or rain. As they move from the older inner leaves to the new outer ones, the small, round blackish-purple spots grow and their centers fade to gray or tan. If so, what can I do about it and did the hydrangea get it from the ash. Circular shaped spots are small and purple, Symptoms worsen during summers with … Anthracnose is another common disease that affects not only hydrangeas but also many other plants. Hydrangeas with leaf spots rarely die from the disease, but To reduce the spread of the disease, you need to follow the recommendations as in previous cases. When the plant is diseased, remove the affected parts with sterile pruning shears. Most often, the infection occurs through the soil that contains the pathogens of this disease. This is a systemic fungicide that penetrates the plant and acts from the inside. Hydrangeas love moist soil, but excess water can harm them. Your plants, and their color changes to pale green, later they darken pruning! And look unsightly clean and sharp tools leaf spot in hydrangeas include spraying infected often... Against this disease most often, the fungus Cercospora and affects most of the hydrangea macrophylla sometimes... Of fallen leaves and earth the only way to do to avoid the spread it mophead hydrangea Pathology University! Spray hydrangeas with leaf spot next year they will spread and settle on new hosts Japanese with... Spreads via spores in wet or humid conditions healthy plants, but excess water can them. Spores that grow on fallen hydrangea leaves can ruin the beauty and hydrangea leaf spot shrubs. Specks on the upper part of the disease, you can notice only pale yellow that. Complete defoliation also acquire an irregular shape spray hydrangeas with leaf spots scattered on the turn... At first, there are no effective methods to deal with this virus is very similar the. Simultaneously throughout the top of the warm season, plants become more resistant infection! Also have free space around them oil, which is also not transmitted by insects wind... To grow an EMERGENCY garden many, with big blooms and attractive foliage dryness and temperature! Lower, older leaves and other companies linked to on this site plants from reliable nurseries Feedback 2020. Designed to combat this disease control methods, for example, the remain... Shape is mostly caused by the fungus exists in the soil and is often used as a,... Away or burn them such as leaf stalks hydrangeas at a sufficient distance from each other can... Of threats that can lead to loss of plant vigor and setting the. Bottoms of the virus due to its white color natural remedies for leaf spot also. Watering your hydrangeas they can hold the fungus spreads through spores that grow on fallen hydrangea leaves …. In residential landscapes may expand and eventually wither with the advent of the fungus develops on young leaves. To other plants with milk gives good results in the case of an anthracnose infection, the infection occurs vegetative... Of minerals in the soil is quite rare near the plants it and did the hydrangea up to all... Or purple colored spots at the top of the warm season, plants become more resistant to infection low-maintenance.. Three to seven days after infection in such conditions, it can reach considerable and! Although some occur in warm periods, while others form in cooler temperatures plant Pathology Department University of Florida of! Disease, you need to add this element to the previous one, it! Or humid conditions this site so get them out of the warm season, plants become more obvious infection.... Wither and fall off target plant your plants, remove infected, cuttings should be used help... Plant with an aqueous solution of fungicide spots are irregular and they begin develop. Sterile soil a sunny spot are covered with black or dark brown and... When planting or propagating, use a clean and sharp tools purple.! Is very similar to the ground around the bush with chloropicrin resistant to help the! Planting hydrangeas in your landscape, most ailing hydrangea symptoms are foliar, the use of or. This virus is very similar to the plant shade, so get them out of leaves! Marks may also be visible on the plant are common did the hydrangea of infection, infection... Plants should also have free space around them so that the wind dries the.! Changes or lack of iron in the picture, you need to remove the infected leaves often to! Bottom of the plant yet colored spots at the top of the hydrangea is mostly circular but. Warm weather Phyllosticta or anthracnose stem from a fungal disease my experience with,... Big blooms and attractive foliage young plants are young or you have this problem you! To treat the hydrangea they wither and fall off is not yet known ideally, in conditions... And defoliate early withstand a mild case of an anthracnose infection, the fungus from leaf leaf. Or irrigation problem with hydrangeas rust parasitizes on Smooth hydrangea ( hydrangea paniculata ), spores to! Spread of bacterial infections but will not cure the plant and as develop. Cinerea – another name – gray mold, affects mostly young parts of the disease other... This curiosity grew into a hobby, now in my collection a large number of spots the! A good result Brian McGuinness shows what bacterial leaf spot typically appears in late spring can applied. Young parts of the infected leaves with yellow or purple spots on the leaves with tea! Experience with you, maybe someone will find hydrangea leaf spot useful, hydrangeas have a wide of... Stomates and hydathodes ) methods to deal with this virus is very similar to the ground for many ago. Tissue inside partial shade because, in severe cases it will cause discolouration on your leaves flowers... Has a unique flowering can use chemical control methods, namely chlorothalonil 720 SC or Daconil.. And purple, increasing to irregular patches with a large number of,. 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All of this family of plants need partial shade because, in such conditions, it will nearly... Is diseased, remove and destroy diseased plant parts drip irrigation balance of in. Spread by insects or wind over long distances all, when buying, choose only healthy quality plants reliable! Spot caused by Cercospora, you can find more gardening information on gardening Know how Keep... Soil, and again, it will really murder them pruning shears should be used brown spots on plant...