Feeding Venus flytraps is unnecessary for their survival. They posses the ability to both hunt on their own and to survive on nothing more than good quality water and direct sunlight. Still, some people chose to feed their plants insects because they find it interesting. Follow these feeding guidelines to keep your Venus flytrap in the best possible condition.
Give the Venus flytrap access to a minimum of four hours of direct sunlight every day. Provide 12 hours of total sunlight exposure. The flytrap uses water and sunlight to meet its nutritional needs.
Give the Venus flytrap enough pure water to keep the soil moist, but not wet. Avoid wet soil conditions, which leads to root rot. Do not use tap water because the trace elements, minerals and treatment chemicals can damage or kill your Venus flytrap.
Give the plant no more than one insect per week. Understand that Venus flytraps do not need to eat insects to survive. Feed the plant only insects that are alive or have died of natural causes. Avoid insects exposed to pesticides.
Do not fertilize. Fertilizers will burn your plant and damage the root system. Unlike with some other houseplants, fertilizers and commercial plant foods will not help the plant grow, but rather will quicken the plant's demise.
Avoid feeding the plant anything other than insects. Do not try to trigger the plant's hunting and snapping techniques with other food items, sticks or your fingers. Allow the plant to either hunt and feed naturally or feed it only insects.
Choose the right soil. If re-potting your Venus flytrap, use a nutrient-deficient, poor quality soil. It may seem like providing poor soil will not provide adequate conditions for your plant, but keep in mind that Venus flytraps do not rely on soil for nutrition. Use a mix of perlite, sphagnum moss and peat. Avoid products with fertilizers mixed in.