10. Ficus Microcarpa
Ficus Microcarpa, also known as Ficus Ginseng, Chinese Banyan Tree, Malayan Banyan Tree, Taiwan Banyan Tree, Long Island, curtain fig etc, it is a tree native to South Asia. Ficus Microcarpa is hardiest tree which does not need direct sun light, frequent watering or feeding that makes it best bonsai for beginners. Ficus Benjamina from same ficus group was part of NASA Clean Air Study and it was found very effective in improving indoor air quality by removing formaldehyde, xylene and toluene.