potted_plant
Sunflower care requirements
water
Moderately. Deep but infrequent once established.
soil
Well-draining soil. Tolerant of poor soil.
light
Full sun — absolutely essential.
symptoms
Symptoms to look for in Sunflower
Yellow patches on the upper leaf surface with greyish-white fuzzy growth underneath, often causing stunted growth and distorted flower heads in severe cases.
help
Common causes in Sunflower
Downy mildew often infects sunflowers through contaminated seed or soil-borne spores, favoured by cool, wet conditions especially early in the growing season.
healing
How to treat downy mildew in Sunflower
Remove and destroy affected plants since downy mildew can be difficult to control once established, and avoid overhead watering on remaining plants.
shield
Preventing downy mildew in Sunflower
Use disease-free seed, rotate planting locations yearly, and avoid overhead watering, especially in cool, wet weather.