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How to fertilize carnivorous plants
Place your carnivorous plants in soil that lacks nutrients.
Since carnivorous plants rely on insects as their main food source, these plants thrive best in specific types of soil.
Use horticultural sand or sphagnum peat moss as the soil for your carnivorous plants.
Supply your plant with water that does not contain nutrients. Carnivorous plants thrive best in conditions that lack nutrients, and the minerals commonly found in most water types can over-fertilize your plant.