Brown Spots on Pelargonium 'Peppermint': Fungal from Overhead Watering

Brown areas on geranium leaves—not matching rust—are likely fungal (Alternaria, Botrytis) promoted by wet foliage from overhead watering or poor ventilation.

Cultural Correction

• Water at soil level only; no sprinklers.
• Space pots for air flow.
• Avoid pesticide splash between plants.
• Use open-mesh benches, not solid tops.
• Hard to reverse once established; preventative is key.

Atomic Grow (organic) may help; but changing watering practice is essential.