Black Spot is the most despised disease of rose growers everywhere. This nasty fungal disease shows up on rose bush leaves and as you guessed it, appear as black spots. The spots are circular and surrounded by a yellow ring. This disease spreads quickly and is hard to contain. It’s best to prevent it from happening if at all possible.
There are some varieties of roses with natural resistance to Black Spot, but nothing is guaranteed. If you’re interested in trying them out, you should look for:
- Carefree Beauty
- Knock Out Family
- Easy Elegance
If you have traditional roses (or even one of the above), there are ways to reduce the chances that Black Spot will get them. Follow these steps:
- Pick the ideal location to plant. Roses like about six to eight hours of sunlight every day. The morning sun is best because it dries up the dew; Black Spot loves wet leaves.
- Water your roses early in the day and don’t get the leaves wet. Do this by watering at ground level.
- Make sure your plants have good air circulation. Proper spacing of plants and pruning a few center branches will do the trick nicely. Stale air promotes fungus growth along with wet leaves.
- Cut away and dispose of dead or diseased leaves and branches.
- Make sure your roses have the necessary nutrients to grow well. Add some organic compost to the soil such as ENTER PRODUCT.
You can also apply a preemptive fungicide before the weather warms up. Black Spot goes crazy in warm weather. You can use a teaspoon of baking soda per quart of water and spray down your roses. This natural remedy is easy and inexpensive. You can also use Neem Oil, particularly if you want an organic fungicide. For really bad cases, one of our most popular choices is, Immunox® Multi-Purpose Fungicide.
These fungicides are also the “go to” choices if you already have a Black Spot problem. In addition to the fungicides, you’ll need to cut back all infected areas and dispose of them in the trash. Do not compost diseased plant matter!
If you have more questions on preventing Black Spot or removing it from infected plans, stop by your local Hydro-Scape for more information.