potted_plant
Cosmos care requirements
water
Drought-tolerant once established; water moderately and allow soil to dry between waterings
soil
Poor to moderately fertile, well-draining soil; overly rich soil encourages foliage over flowers
light
Full sun; requires 6+ hours of direct sunlight for optimal blooming
symptoms
Symptoms to look for in Cosmos
- fiber_manual_recordCircular brown or black spots
- fiber_manual_recordYellow halos around spots
- fiber_manual_recordPremature defoliation
help
Common causes in Cosmos
Multiple fungal and bacterial pathogens. Favoured by wet foliage and warm temperatures.
healing
How to treat leaf spot in Cosmos
Remove affected leaves. Apply appropriate fungicide or bactericide.
shield
Preventing leaf spot in Cosmos
Water at soil level. Improve air circulation. Practise crop rotation.