The best place to grow Venus flytraps is outside, when possible. It is possible to grow Venus flytraps outside throughout most of the world during the summer months. Many Venus flytrap growers move their plants outside as soon as the threat of frosts has passed and leave them outside until freezing temperatures return again in late fall.
If you are one of the lucky people that live in a place where the winters are mild (rarely experiencing freezes), then you can leave your Venus flytraps outside all year long. As long as the winter temperatures usually stay above freezing and when it does get below freezing, it doesn’t stay there for more than a couple of days, Venus flytraps will be fine if left outside all year long.
If growing your Venus flytrap outside isn’t an option, then some other choices are a greenhouse, a very sunny windowsill or under a grow light. It is possible to grow Venus flytraps in terrariums, though most growers agree that flytraps do not make good terrarium pets because of the overly wet conditions and stale air.