Drosera species that are classified as tropical and subtropical are found in South America, Southern Africa, Asia and Australia. There are at least a hundred species of Drosera in these regions. Some, such as tuberous, pygmy complex petiolaris and a few other Droseras South Africa are special cases that must be considered separately because of their special needs. But subtropical Drosera grow with varying temperatures and supports the freshness, while avoiding the gel, so they are ideal for terrariums.