Neem oil is a natural and organic way to protect your plants from pests, diseases, and fungi. It has long been used in Ayurveda and herbal medicine for pest control. Neem oil is highly effective against aphids, scale insects, spider mites, and mealy bugs on indoor plants. Neem oil can be used in the garden or as a top dressing on trees, bushes, and shrubs. It also helps to prevent the spread of disease-causing pathogens by preventing them from entering your soil.