rose garden info
Planning Your Rose Garden
Your Rose Garden Site
A Guide to Planting Roses
Feeding Your Roses
Dealing with Rose Disease
Insect Prevention and Treatments for Roses
Winter Protection for Roses
Rose Propagation
Cut Flower Care
Rose Colors and Their Meanings
Roses FAQs
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Dealing with Rose Disease

There are three fungal diseases roses are generally susceptible too. When dealing with rose diseases, the most common of these diseases are Black spot, Powdery and Downy Mildews, and Rose Rust. Black spot and powdery mildew are spread through roses by spores. These rose diseases need specific temperature, moisture and humidity to survive. They usually occur in early Summer and Fall when the night temperatures are cool and moist or the humidity is high. These diseases are fungus infections and can be treated with fungicides.

Disease Control and Prevention

Keeping your roses healthy is your first line of defense. Healthy roses are less prone to disease. Water and adequate nutrients through proper fertilizer and compost will help keep your roses healthy. When your roses are healthy, they are less likely to succumb to disease.

Proper maintenance of your roses will also help, remove and dispose of any dead canes and leaves in the Spring and Fall to prevent the spread of disease. The disease spores can live through the winter months on old and weak leaves and reinfection can occur on any new growth in the Spring.

You have three choices you can do to control these diseases:

1. Do nothing or leave your roses alone, but remember that to much leaf loss can weaken and eventually kill your rose plant. Also these diseases can multiply and become established through out your rose garden site infecting your other rose plants.

2. Once disease has infected your garden, fungicides are an effective means of treatments for your roses. Use chemical fungicides for roses to establish a spraying program. Start your program in early Spring and spray every seven to ten days. Follow the directions carefully and wear protective eye wear and masks when spraying. For sprays to have any effect on your diseased rose plants remember to spray every seven to ten day during the growing season.

3. Many people do not feel comfortable using chemical sprays, due to hazards to humans, animals and the environment. The other alternative is to use an organic spray which is less hazardous, to prevent the disease from occurring. Use the same spraying schedule you would use with chemical sprays, usually every seven to ten days. You may also use these sprays after you find the disease to help prevent it's spread. Using available fungicides that contain copper, neem or sulfur as an organic disease control can be effective against leaf spot diseases. You can also make your own spray using this mixture: Add to one gallon of water, one tablespoon of baking soda and two and a half tablespoons of Sunspray ultra fine horticultural oil, mix well. Apply this mixture to roses in the morning and evening. Follow the recipe, higher concentrations of both the baking soda and the oil can cause more leaf damage. This recipe has been known to be very effective against powdery mildews.

You can test your recipe spray mixture on a small area of your rose plant before completely spraying the whole plant to check for any reactions.

Cautionary note: Rugosa roses can have an allergic reaction to chemical sprays, so use caution when spraying these roses. These sprays can cause leaves to yellow and fall off. Rugosa roses are disease resistant and very seldom need to be sprayed, but there are some exceptions. Some Rugosa roses maybe cross breed with other varieties of roses that are susceptible to these diseases. It is best to test your spray on a small area of your plant to see if it drops leaves. If the leaves do not turn yellow and fall off, spray the whole plant.

Learning about what rose diseases your plants may get will help you solve your problem. Here is a great site that gives you some problems/symptoms of rose diseases with pictures to help you identify what they look like, what may have caused your plants to get the disease and what to do to solve your rose disease problem. Visit:


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