Yellow Leaves on Impatiens - Knowledgebase Question

Dimondale, MI
Avatar for barrattdf
Question by barrattdf
July 20, 2000
The leaves on my impatiens are turning yellow and some have blackish spots on them. They are in partial shade and have been doing very well until recently. Is there something I can do to correct this?

Answer from NGA
July 20, 2000
It sounds as though your impatiens have developed a fungal disease. This can happen when conditions are too wet or when plants are overcrowded. Disease pathogens need three things to become established: a susceptible host (usually a plant that's under stress), a pathogen, and the right environmental conditions. Your best defense against disease problems is to provide all of the cultural requirements necessary for healthy growth, keep water off leaves as much as possible, and remove diseased plant parts as soon as you notice them. If leaves on the entire plant are affected, it may be too late to save your impatiens. If only a few leaves and stems have symptoms, cut them off the plants to encourage healthy new growth.

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