Center Impatiens Yellowing in Flower Box? Poor Air Circulation

Impatiens in the middle of a flower box show yellow, spotted leaves while edge plants thrive. The cause: stagnant air in the center traps moisture on foliage, creating a fungal incubator. Morning-only watering and waiting until soil is dry help, but dense planting blocks evaporation.

Solutions

• Thin center plants to improve airflow.
• Water at soil level only—never wet foliage.
• Space plants wider at planting time.
• Consider a fan on low for enclosed areas (if practical).

Fungus thrives where air doesn't move. The box edges get breeze; the center doesn't. Adjust culture, not just chemistry.