Plants are living things, and they need food. Plants use over 20 different kinds of nutrients, and indoor gardens in particular may need some extra attention to ensure the plants are properly fed. Supplemental nutrients are often used to guarantee that plants are receiving adequate minerals for healthy growth. The main nutrients needed by plants are known as macro-nutrients, and include nitrogen, phosphorus, and potassium. Plants also need a variety of micro-nutrients, which are often found naturally in soil. A successful garden depends upon the gardener's knowledge of signs of nutrient deficiency, and how it can be treated.
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