Terrariums are cool, but a terrarium featuring carnivorous plants? Now that’s awesome.
The sundew is covered with small hair-like structures called trichomes. The trichomes have a sticky substance on them called mucilage, which attracts and captures unsuspecting insects.
Because the sundew is a carnivorous plant, meaning they get their nutrients from their prey, the substrate you place them in should be devoid of nutrients. Otherwise, they will be harmed by the nutrients in the substrate and could die off.