Gac

The Gac (Momordica cochinchinensis) is a gourd native to Southeast Asia. It has large, red fruit with rock like seeds.

How to start
Buy the seeds from a reputable source, and soak them for 24 hours if you wish, to speed up germination, for their seeds have a hard shell. Then plant them in a pot or the ground. They will take a while to grow.

Uses
It is used in traditional chinese medicine. It is being marketed as a juice dietary supplement outside of asia.