Diagnosing Yellow Leaves on Impatiens: Overwatering vs. Fungal Disease

Check Watering First

Excess water depletes nutrients and causes yellowing. Ensure 1.5–2 inches per week total. Improve drainage in clay soil with organic matter.

Likely a fungal disease. Apply synthetic or organic fungicide (garden center) per label. Should improve in 7–10 days.

Milk/baking soda sprays have some merit, but targeted fungicides are more reliable.

Annuals: Why Cuttings Rot After Moving from Water to Soil; Phalaenopsis Yellowing Leaves & Root Confusion: Repot, Assess, Seal Trunk Wound; Phalaenopsis Mushy Leaf Spot: Possible Bacterial Infection; Caragana Yellow Leaves: Overwatering Diagnosis; Nepenthes in Rock Garden Yellowing: Root Contact with Standing Water Suspected; Treating Ficus Yellowing and Pests: Fungus Gnats, Aphids, and Drainage Fixes; Diagnosing Yellow Leaves on Houseplants: The Three Main Causes; Pygmy Date Palm Yellowing in Las Vegas: Overwatering and Drainage; Leaf Spot Fungus on Potted Impatiens: Watering Practices and Air Circulation; Geraniums in Full Sun: Preventing Yellow Leaves with Proper Planting and Watering

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