The Ficus Bonsai Tree is a lucky & beautiful houseplant that is loved by numerous plant parents. Also, Ficus is one of the easiest of all the Indoor evergreen species for bonsai. They need a minimum temperature of about 10°C or 50°F during the Winter and kept just moist. Some varieties will lose all their leaves in Winter, but do not panic – they will get their new leaves in the Spring. The Ficus genus belongs to the family of mulberry plants (Moraceae). The Retusa is among the most tolerant, versatile, and trouble-free bonsai trees making them popular for indoor use. There are hundreds of varieties of the Ficus, but a common one for Bonsai is the Ficus Retusa, which is often shaped in an s-curved trunk and has dark green, oval leaves. The watering of your bonsai must never be neglected. Apply water before the soil appears dry – never allow the soil to become completely dry or waterlogged. You may need to water more during the summer months. The ficus benefits from being in full sunlight.