It takes quite a while, and if they are not kept in the right conditions they will easily die. They grow very slowly, so if you want a giant bug-eating monster, I'm sorry to say they usually end up about 5 inches in diameter. And they die a lot because its hard to provide proper care. A website that has good tips on caring for Venus Flytraps can be accessed by clicking on the related link below.
A Venus Flytrap flowers every Spring. It produces seeds after three to five years.
It should take them 3 to 6 weeks.
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Unless there is a shortage of flies, or it looks like it is dying, you do not need to feed a Venus Flytrap for it to survive.
Take a look at this website (see link below). It has extensive knowledge on Venus Flytraps.
Take a look a the related link below.
That depends on its health. Less than a second - healthy. More than a couple of seconds - unhealthy.
A Venus flytrap will reopen at different times depending on if the flytrap digested its catch or not. The plant has small openings available after snapping shut that allow small prey that is not worth digesting to escape. When this happens, the Venus flytrap will reopen within 12 hours. If digestion occurs, the plant will reopen about ten days later.
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The Average Venus fly trap, If caught something, will take about 1-3 weeks. If the plant has not opened up by the last date possible, I suggest you take it to the place you bought it, and ask them for a new one. Alana<3xD
1/30 of a second
Venus Flytraps have simple white flowers that are pollinated by insects that are not attracted to its carnivorous traps. (Ironic, right?) If you own a Venus Flytrap, and you don't want seeds, cut the flowers, because they waste the energy and resources of the plant.