1. Indoor plants
Brown or necrotic spots on leaves
New leaves curled and deformed, leaf edges dry, or yellow spots appear
Root tip necrosis, slow growth, susceptibility to disease
2. Vegetables (tomatoes, peppers, etc.)
Navel rot: black spots appear at the end of the fruit, common in tomatoes, zucchini, and peppers
Slow growth and apparent deformities of the fruit
Dry leaf edges, thinning leaves
3. Fruits
Uneven fruit development
Soft skin, easy to rot
