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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
Small orange-brown pustules on both leaf surfaces, sometimes merging into larger patches, and can cause significant leaf loss in severe infections.
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Common causes in Sunflower
Sunflower rust spreads via wind-blown spores and is favoured by humid conditions with extended leaf wetness, and can significantly reduce seed yield in badly affected plants.
healing
How to treat rust in Sunflower
Remove and destroy severely infected leaves, and apply a fungicide labelled for rust if the infection is spreading quickly, particularly on plants grown for seed.
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Preventing rust in Sunflower
Rotate planting locations yearly, choose rust-resistant varieties where available, and avoid overhead watering.