Will planting flowers, grass and trees on the rooftop affect Feng Shui?

Yes, as long as the rooftop is a fully enclosed building structure, it will not affect Feng Shui.

Of course, rooftop green plants should be planted scientifically.

First, avoid corrosion damage to the waterproofing of the top floor building. If the roof is damaged, the gain will outweigh the losses;

Second, appropriate varieties should be selected to improve the mood and reduce the temperature of the roof. Mainly, do not choose toxic and polluting plants;

Third, fertilization should be as scientific as possible to prevent the spread of toxic substances, and it is best not to plant near windows;

Fourth, if the green plants are too high, appropriate wind protection measures should be taken. If it is a public building, green plant planting should be allowed by the convention, so as not to cause troubles other than Feng Shui.