A terrarium offers the Venus flytrap plant an almost ideal growing environment. Venus flytraps and other carnivorous plants require high humidity and moisture to thrive outside their natural habitat. Choose a Venus flytrap 1 to 3 inches in height to transplant into the terrarium. The size of the Venus flytrap will determine how large a terrarium you will need.
Fill the bottom 1/4 inch of the terrarium with pea gravel or pebbles.
Mix together equal amounts of peat moss and white silica sand in a bucket or large bowl. A Venus flytrap does not grow well in regular potting soil.
Wet this mixture thoroughly. Grab a handful of the mixture and squeeze to remove excess water. Place the mixture into the bottom of the terrarium. Continue this process until you have filled the terrarium with 3 to 4 inches of the growing medium. For a smaller terrarium use at least 1 1/2 inches of the growing medium.
Remove the Venus flytrap from its existing pot. Gently shake off the original soil from the root of the plant.
Scoop a hole into the growing medium deep enough to bury the roots. Depending on the size of the terrarium opening, you can use a spade, a spoon or any utensil, such as a pencil or chopstick, that can fit in the opening.
Place the root of the plant into the growing medium and cover with additional soil.
Keep the lid off the terrarium until the leaves of the plant have dried, if it became wet during the transplant process. Remove the lid for a day, at least once a week, to allow airflow to reach the Venus flytrap.