Is magnolia suitable for planting on the roof?

Of course.

First of all, you need to choose a flowerpot with good air permeability, such as a ceramic pot, a purple sand pot or a cylinder, because several flowerpots have better ventilation performance and are more conducive to the growth of white orchids.

Good light conditions are the main conditions for the good growth of white orchids, and insufficient light will lead to virtual growth and reduced flowering.

Potted white orchids should not be watered too many times or too much. The exact watering method is to wait until the water in the basin soil is completely evaporated and the soil is dry. There is no need to water it every day, but you can often spray some water on its leaves.