Originally Posted 8/7/2015 by Talia Slater
A pocket full of posies,
Ashes ! Ashes !
We all fall down”
Black spot is one of the most common diseases of rose bushes. If they are left unchecked, the rose garden will get damaged. Black spot is caused by the fungus “Diplocarpon Rosae”. Black spot begins just as its name suggests it shows the black spots on the surface of the leaves. Black spot thrives in wet, humid weather, usually when temperatures are in the mid-70’s F. The spots produce spores which spreads to other leaves and plants. Spores can survive the winter in fallen leaves and infected canes, then return the following spring.
Now, you may be wondering what the childhood song “ Ring-around the rosie” is doing inside this blog. The childhood song has similar preferences towards Rosa gallica ‘Lafayette‘.
“Ring-around the rosie” Look into the Wyck Rose Garden
“A pocket full of posie” There are bundles of roses everywhere
“ Ashes ! Ashes !” You will see a particular rose that has dozens of black spots on the rose leaves that are mostly at the bottom of the bunch.
“ We all fall down” If you don’t protect the roses they will die from the Black Spot disease and they will fall down.
To prevent Black Spot:
-Water in the morning
-Avoid watering foliage
-Choose resistant roses
– Allow air circulation
– Choose sunny locations
-Keep the garden clean
-Stay alert and try to keep the leaves separated
-Prune leaves that show signs of black spot and clean your tools after!