Venus flytraps ( Dionaea muscipula) have a necessary winter dormancy period, triggered by nighttime temperatures below 10 degrees C (50 degrees F) and reduced day length. In climates with mild winters they can be kept outside to overwinter (hardiness Zone 9 or greater). The soil should be kept slightly moist and the area well ventilated to prevent the growth of gray mold. Those who live in areas with extremely cold winters (hardiness Zone 8 or less) might consider placing plants in a plastic bag in the refrigerator crisper drawer for two to three months, starting in autumn. You will need to check the plant about every two to three weeks to ensure that the soil stays moist and the roots don't dry out.

This will satisfy the winter dormancy requirement.

Until the plant can be put back outdoors, keep the in a terrarium setting with ample moisture, humidity, and bright indirect light.

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