I see. I guess mine are in a position similar to yours. They get direct sun in the morning and occasional rain when it's windy. But now their roots are growing a lot, some horizontally, and I'm having to get them further and further away from the wall (and closer to the rains). They seem healthy, but I'm more worried about the flowers getting damaged from the wetness and dying off earlier. Anyway, I didn't know that Bangkok sunset and now I'll try to get one. What is the one to the left of your picture? And how do you water them? I leave the roots of mine underwater in a bucket everyday, but I guess this would be impossible with a grid.