Nepenthes Nepenthes plants are interesting because they develop typical cup-shaped leaves. These attract and trap insects, while the lower part of the trap contains glands with nutrients and produce food for the plant. There are two types found in Nepenthes plants: low-grown and high-grown. They can be told apart by the size of their cups and the temperature they require to enable them to grow. The high-grown type needs a higher temperature to grow (from 16°C and 35° C) and has large cups of multiple colours, while the low-grown type will prosper at lower temperatures (from 10° C to 24° C) and has smaller cups in a green-violet combination.