Strath76,
It had been in my grow light for 6 months. No flower produced. When I get it from nursery, there is multiple type of U together. So it could be few type of U in one pot.
Khoas,
As I read from book, (sorry that I just reading with no experience on this plant) if two type of U in single pot may cause another of U disappear if it slow growing. Is this true? Currently they are in 2 inches pot.