Which Directions Are Bad For Planting Shrubs

[myfs_88310]

Dear Master Cecil:
I am in the U.S. Here, people plant shrubs all around the exterior edges of a house (in every direction).
I am very worried about planting shrubs outside the house. I do not want to plant anything and find out later on that it has adverse impact on the Feng Shui.
Shrubs are "wood". Which directions are not suitable for having lots of wood? Or we should examine eight directions in conjunction with the Flying Star? Would you provide advices? Thank you.
Regards,
Jen