Eggplants are susceptible to several pests; however, if your plants are healthy ... the flea beetle—a tiny black or brown beetle that chews tiny holes in leaves. A significant infestation ...

Telltale signs: Leaves of infected plants yellow quickly, followed by light green spots or brown lesions. Plants affected: Common veg plants like tomatoes, potatoes, peppers, eggplants.

Giving your plant too much water can lead to a whole host of problems, including brown spots on its leaves. “Watering issues can often be brought on by seasonal changes,” Lambell explains.