This comes down to personal preference, as whether you opt to use faux foliage, like these faux pine arrangements available on Amazon, or real foliage will depend on a range of factors.
However, mixing both real and faux foliage can work exceptionally well for creating a streamlined and cohesive look throughout your home.
It's also worth noting that real foilage will bio-degrade and you don't have to think of another place to store it — a helpful solution in a small space.