22+ Red Spots On Hydrangea Leaves

Rust spores are spread in water or on the wind so avoid splashing your plants when watering. Leaf spots on a hydrangea are caused by the fungal infection cercospora.

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Red spots on hydrangea leaves

This is because the macrophylla plant also known as a mophead hydrangea features the largest leaves of any hydrangea plant. Natural remedies for leaf spot in hydrangeas include spraying infected leaves with compost tea liquid kelp garlic oil or hydrogen peroxide. The fungus spreads through spores that grow on fallen hydrangea leaves.

The disease rarely kills hydrangea plants but it can cause leaves to drop and look unsightly. Cool weather on either end of the growing season can also trigger a red purple color in leaves. Using soaker hoses rather than sprinklers or spray nozzles can help.

Cercospora leaf spot typically appears in late summer and fall. The other issue could be a phosphorus shortage in soil especially if leaves turn more purple than red. This fungal disease looks like round orangish spots on the underside of hydrangea leaves.

In most cases these leaf spots are indicative of cercospora leaf spot a temporary condition caused by the fungus cercospora hydrangea which is perhaps the most common disease seen on hydrangeas during the months of july through october. Hydrangea leaves turning red usually happens when plants are growing in full sun and have experienced a dry spell. Macrophylla hydrangea plants are the ones that are most commonly afflicted by these red spots and they are the ones where the spots tend to be the most noticeable.

Compost tea can be made by filling a burlap bag or old. The tops of leaves turn brown or yellow and eventually fall off. The spots form due to water drops from rain or irrigation that sit on leaves during hot and humid conditions.

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