Where do fungal leaf spots typically occur?

Fungal leaf spots typically begin to manifest on lower leaves of the plant. This is largely due to the fact that lower leaves are more susceptible to conditions that favor fungal growth, such as higher humidity and moisture levels present near the ground. As the disease progresses, it can spread to the upper leaves and other parts of the plant, but the initial development often occurs lower down.

This behavior is consistent with how many plant diseases start; pathogens, including fungi, often target the damp and shaded areas of a plant first. This makes it crucial for gardeners and crop producers to monitor lower foliage closely for any signs of fungal diseases. Recognizing initial symptoms in these areas can allow for timely interventions, potentially preventing further spread to more visible parts of the plant, such as upper leaves or flowers.