One Of The Most Common Rose Diseases
What Causes It:
- Heavy Rainfall
- Splashing Water on rose leaves during watering
- Mold spores and fungus left over from previous years or from general neglect
How To Treat It:
- In the dormant season (when roses are not growing) apply a dormant spray such as Lime Sulphur. Spray the rose bed and the entire bush. This will kill any fungal disease lurking about.
- DO NOT APPLY DORMAT SPRAYS DURING THE GROWING SEASON. It can kill your roses!
- During the growing season, (especially the show season) I spray my roses every 10 days with a fungicide. There are several kinds on the market. Some earth friendly, some not. I have used Manzoceb, a chemical spray for several years with good results. This year, I began using “Green Cure” fungicide which has no harmful chemicals on my miniature roses, and have also had good results.
- If you have a real problem with Blackspot. It’s ok to spray two times per week, remembering to remove any diseased leaves each time. The blackspot should clear with in 10 days.
Prevention is the key! My Mama used to tell me, it’s better to “prepare and prevent”, than to “repair & repent”.
- Keep your rose beds free of fallen leaves and other garden debris
- Always water roses from the base of the plant. Never the top.
- Remove all diseased leaves from your roses. Blackspot is a fungus and will quickly spread.If you will employ these practices in your rose garden, your roses will thank you for it!