Powdery mildew on dahlia

Powdery mildew is a common fungal disease that can affect dahlias. Here are some tips to deal with powdery mildew on dahlias

1. Prevention

Plant dahlias in a location with good air circulation and plenty of sunlight. Proper spacing between plants can also help reduce the spread of the disease.


: Avoid overhead watering and aim to water the soil directly. Wet foliage can contribute to the development and spread of powdery mildew. Water in the morning to allow the foliage to dry during the day.


Remove any affected leaves as soon as you notice signs of powdery mildew. This can help prevent further spread of the disease. Make sure to properly dispose of the infected plant material.


If the powdery mildew persists or is severe, you may consider using a fungicide specifically formulated for powdery mildew. Follow the instructions on the label carefully.

Good plant hygiene

Clean up fallen leaves and other plant debris around your dahlias. This can help reduce the chances of reinfection in the following growing season.

prevention and early intervention are crucial in managing powdery mildew. Regularly inspect your dahlias for any signs of disease and take appropriate action promptly.