Dogwood with Leaf Spots: Causes & Solutions
Cornus
Dogwood is a plant that needs bright light and moderate watering. When showing leaf spots, it may indicate issues related to its environment or care.
Is your Dogwood showing leaf spots? Discover 5 possible causes and how to treat them.
🔍 Possible Causes (5)
Powdery Mildew
Powdery mildew is a common fungal disease caused by various fungi species including Erysiphe, Podosphaera, Oïdium, and Leveillula. It affects over 10,000 plant species worldwide. The disease thrives in warm, dry climates with high humidity and appears as a distinctive white powdery coating on plant surfaces.
✓ Related symptoms:
- • White to gray powdery spots on leaves, stems, and buds
⚡ Quick Fixes:
Remove heavily infected areas
Anthracnose
Anthracnose is a fungal disease caused by fungi in the genus Colletotrichum that affects many plants, including vegetables, fruits, and trees. The disease thrives in cool, wet conditions, causing dark, sunken lesions on leaves, stems, flowers, and fruits.
✓ Related symptoms:
- • Small irregular yellow or brown spots on leaves
- • Dark sunken lesions on leaves, stems, flowers and fruits
- • Water-soaked lesions that darken as they age
⚡ Quick Fixes:
Remove and discard all visibly infected parts
Canker
Canker is a disease caused by various fungi and bacteria that create necrotic, sunken areas on bark of branches, stems, and trunks. Pathogens enter through wounds and natural openings, especially when plants are stressed. Canker can gradually weaken or kill branches by disrupting water and nutrient flow.
✓ Related symptoms:
- • Sunken, discolored lesions on bark
- • Progressive branch dieback beyond lesion
⚡ Quick Fixes:
Identify and mark all branches with canker
Gray Mold (Botrytis Blight)
Gray mold, caused by the fungus Botrytis cinerea, is one of the most common fungal diseases in plants. It affects over 200 plant species, including ornamentals, vegetables, fruits, and houseplants. The disease thrives in cool, humid conditions with poor air circulation, causing grayish spots and soft rot on infected tissues.
✓ Related symptoms:
- • Grayish colored soft, mushy spots on leaves, stems, and flowers
- • Brown to gray circular spots on leaves and petals
- • Water-soaked lesions that expand rapidly
⚡ Quick Fixes:
Remove and dispose of all visibly infected parts
Crown Rot
Crown rot is a serious fungal disease that attacks the crown (base) of the plant where the stem meets the soil. It is caused by various fungal pathogens including Phytophthora, Fusarium, and Rhizoctonia. The disease thrives in waterlogged conditions and can quickly spread to kill the entire plant if not addressed promptly.
✓ Related symptoms:
- • Dark brown lesion girdling the main stem just above soil line
⚡ Quick Fixes:
Immediate unpotting