Displays of nature that are not living displays of nature (like artificial flowering plants) are neither good nor bad, but they do affect.
A living plant inside a building adds oxygen to the air, adds beauty, and increases the stabilizing positive energy in the building. It draws the eye and, unknowingly to people, uplifts the soul. A fake plant, no matter its similarity to a living one, can only add beauty, and nothing else. The most important work of a living plant is not only not done, but is lost. The uplifting effects of living plants are important and should not be underestimated.
Eating food in a restaurant that is decorated with fake plants fails to feed the soul. Working in an office decorated with fake plants does not energize the workers. Living in a house that contains only fake plants and no living plants is a house bereft of the soulful energy provided by plants. A smattering of fake plants is acceptable as long as there are live plants as well.
A smattering is the amount to use when decorating with fake plants and flowers.