Cattleya Black Leaf Spots: Fungus, Not Virus

Black Spots on Bifoliate Cattleya = Fungal Damage

A bifoliate Cattleya (two leaves per pseudobulb) with black leaf spots, good new growth, no flowers.

Diagnosis

• Black spots = fungus (likely from water on leaves overnight).
• Not blooming = wrong season. Most Cattleyas bloom late winter–summer.
• Leaves medium green = needs more light for blooming (target lighter green).

Care Adjustments

• Water mornings only.
• Increase light to 4–6 hours direct sun (summer).
• Remove badly spotted leaves with sterile cuts.

New growth is healthy. Fix light and watering, and flowers will come in season.