coronavirus
Leaf Spot in Helianthus Perennial
How to identify and treat leaf spot in Helianthus Perennial.
potted_plant
Helianthus Perennial care requirements
water
Moderate; water regularly during growing season; drought-tolerant once established; reduce in winter
soil
Well-drained soil; tolerates poor to moderate fertility; slightly acidic to neutral pH
light
Full sun (6+ hours daily); requires strong light for flowering and sturdy stems
symptoms
Symptoms to look for in Helianthus Perennial
- fiber_manual_recordCircular brown or black spots
- fiber_manual_recordYellow halos around spots
- fiber_manual_recordPremature defoliation
help
Common causes in Helianthus Perennial
Multiple fungal and bacterial pathogens. Favoured by wet foliage and warm temperatures.
healing
How to treat leaf spot in Helianthus Perennial
Remove affected leaves. Apply appropriate fungicide or bactericide.
shield
Preventing leaf spot in Helianthus Perennial
Water at soil level. Improve air circulation. Practise crop rotation.