For those of you with a terminal black thumb, robotic plants  may be the answer:
Just like real plants, the robot emits oxygen, moisture, and aroma. It also responds in various ways to stimuli from outside, such as approaching persons, music or light. When a person comes within a 40 cm radius of the flower, its supersonic sensor perceives the approach, the stem bends towards the person, and the buds come into full bloom. When the person leaves, the plant returns to its original state.
If a person’s voice becomes louder than a certain level, the flower buds will come into bloom, and the stem shakes slightly to suggest a greeting. When the room lights up, the buds open and close, and when music is played, the plant dances.
I believe I’ll stick with the real things, thanks.