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If you need to treat fungus on ranunculus read on!
While Ranunculus is the name of a genus that includes hundreds of species, R. asiaticus is the species most typically grown in the home garden. Ranunculus thrives in cooler temperatures and may not survive extended periods of temperatures above 60 degrees Fahrenheit.
Grow it indoors if you experience warm weather in the fall. Officially, the plant is hardy to U.S. Department of Agriculture plant hardiness zones 8 through 11. Enter your ZIP Code to find your growing zone here.
Wherever you choose to grow your ranunculus, provide it with lots of sunshine and good air circulation to avoid fungal diseases. For added protection, treat the ranunculus with a protectant fungicide.
Type of Fungicide
Several types of fungicides will help prevent a downy mildew infection, the most common fungal infection of ranunculus:
If the plant is already affected, use Monterey Complete Disease Control
Time the application according to label instructions.
Learn more about copper fungicides here.
Maintenance Spraying
Reapply the fungicide if it rains within four hours of application; otherwise reapply every 10 days to protect new growth.
