The fungal spores can be spread from plant-to-plant by the rain, wind, and also by gardeners on their tools and bodies.īacterial diseases can hit most of the plant’s tissues and are often spread by insects or tools. Fungal diseases are caused by spores and tend to affect the flowers and foliage. Hydrangea diseases can be classified into two groups, either fungal or bacterial. Hydrangeas are impactful shrubs for the yard (Image credit: mauritius images GmbH / Alamy Stock Photo) How to spot hydrangea diseases This includes the signs to look out for, what can be done to alleviate the potential risks, and what remedies are out there if your plants succumb to any of the diseases. Burn the plant in a garden incinerator or send it to the landfill don’t throw it on the compost heap because it will live in your compost as it lives in dead organic material.If you are growing hydrangeas for these reasons and more, and want to discover more about hydrangea diseases, we take a look at eight of the most common. If the majority of your plant is infected, you will need to dig up the entire plant. There is no treatment in terms of fungicides, so it’s more about tidying up and removing dead foliage, buds and flowers from infected plants as soon as you notice it. I also find that it helps to mulch around the base of plants outdoors because this stops the spores from getting splashed upwards into the leaves as the disease can live on the surface of the soil on fallen dead material. Water early in the day, so the excess water has time to evaporate and water from the base. Remove any dead or diseased leaves and pick up the fallen flowers, buds and leaves.ĭon’t let the plants and surrounding soil become over wet and overly humid, especially in a greenhouse. Do this when planting new plants and pruning out existing plants to create space between them. Some ways I have noticed help to prevent botrytis cinerea is to ensure there’s plenty of space between the plants to ensure good air circulation. This includes giving them the best growing conditions. I would perhaps spray plants in spring, however, I find that keeping plants healthy and growing well is the best way to prevent it in the first place. This isn’t as obvious because it has caused the stem to die back but there is no grey mould How to help prevent grey mouldĪs previously mentioned, there aren’t any fungicides that are labelled to treat grey mould it may be worth trying a general fungicide. It will thrive in a damp, cool, stagnant environment. Once it infects a plant, usually through a wounded part or even a stressed plant, throughout the growing season, it spreads further and can infect most of the plant as well as quickly spread to other plants, especially if they are overcrowded. It can appear at any time of year in greenhouses because the conditions are always right, which means it needs humid conditions. What is Botrytis Blight?īotrytis Blight is a common fungal disease (commonly known as grey mould) that’s first seen in the spring on younger shoots. Then you have peonies, cyclamen, geraniums and primulas in fact, just about any plant is at risk. To name a few that immediately spring to mind, they include snowdrops, onions, broad beans, cucumbers, courgettes, strawberries, tomatoes, blackberries and grapes. This includes ornamentals, bulbs, vegetables and fruit bushes. I have seen Botrytis infect just about any type of plant. Botrytis Blight on the damaged stem of a tomato plant
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