• Bog plants like the sundew thrive in the moist, humid conditions of a terrarium.Jupiterimages/Photos.com/Getty Images
  
  Terrariums provide a humid growing climate that many popular bog plants thrive in. Carnivorous plants such as the Venus fly trap do well in terrariums, as do many tropical and temperate grasses, semi-aquatic varieties, and even exotics like dracaena and air plants. Bog plants need little attention in a terrarium; opening the environment reduces the humidity and disrupts the climate inside.
  
  

Cardinal Flower

• Cardinal flowers (Lobelia cardinalis) thrive in humid and wet conditions around bogs and ponds in partial sun. As a terrarium plant, the cardinal flower stays moderately compact instead of its usual height, and blooms prolifically, especially when deadheaded to remove the dying blossoms. Humidity helps to encourage more lush growth of the leaves. The flowers are deep scarlet red and the bright-green foliage provides a striking contrast. A long-blooming flower, the low-maintenance cardinal works well in any moist, humid setting. Plant lobelia behind other bog plants to allow more light through.
  
  

Sundew

• Sundew (Drosera sp.) thrives in humid tropical and temperate climates. This carnivorous plant captures insects and other protein from its environment when nutrients are scarce. Sundew lures the insects with glistening drops of a sweet dew; once the prey is stuck to the honey, the plant activates tentacles that hold the bug secure while the plant releases a mixture of enzymes that act as a digestive acid and break down the protein material to a nutritional soup that the sundew absorbs for added nutrition. The sundew does well in moderate sunlight or cool fluorescent light. Only a few of the cultivars of the sundew are small enough for terrariums, such as the D. adelae, which reaches heights of about 8 inches.
  
  

Watercress

• Watercress (Nasturtium officinale) grows in moist environments and prefer full light. This perennial vegetable thrives in water, the stem and leaves staying below the water's surface when planted in bog settings. Watercress spreads quickly with flowers in white and green clusters. Hollow stems float to keep leaves on the surface and higher. Other names for watercress include biller, long tails and rib cress.
  
  

Striped Bladderwort

• Striped bladderwort (Utricularia striata) blooms through July to October with vivid colored flowers resembling snapdragons. The flowers grow above the shallow muddy water while much of the stem and roots stay below the surface. The bladderwort's trap catches insects by brushing against the trigger hairs just at the opening to the bladder or pocket. As a carnivorous plant, the striped bladderwort obtains protein because of insufficient nutrients in its environment.