Can we plant a hundred-day red bauhinia on both sides of the fence gate?

Absolutely. Hundred-day red flowers have a long flowering period, and red flowers symbolize that the days will be booming; The flowering period of bauhinia is purple, which symbolizes the wealth of "purple gas coming from the east". I don't know if you are in the south or the north. If it is in the north, it is best to plant some evergreen trees (such as pine trees) that can survive the winter to avoid sparse trees in winter, which is not good for Feng Shui.