Indoor bonsai: Term and needs
What are indoor bonsai ?
Indoor bonsai are not hardy. This means that they must be protected from low temperatures during the cold season. Most Indoor bonsai (eg. Ficus, Jadebaum, Sageretie, Carmona, Liguster) come from tropical and subtropical areas. Even in winter there are temperatures far above freezing and indoor bonsai from there do not need to be frost hardy. Indoor bonsai are also genetically unable to adapt to frost.
Picture: As Indoor bonsai frequently offered in online shops
Indoor bonsai: light and temperature
Indoor bonsai, like all plants, need light. Lots of light. They're doing photosynthesis to gain energy. In a normal apartment, the supply of light for room bonsai is very small. Ie. if the temperatures in spring and summer allow it, indoor bonsai should be placed outside. In winter, when an outdoor location is not possible, they choose a very bright window seat for their indoor bonsai.
Like other plants, bonsai have a metabolism. This is temperature-dependent, ie. high temperature = high metabolism. High metabolism goes hand in hand with high energy consumption. In the heated room, the energy consumption of the bonsai is correspondingly high. At the same time, energy generation is low due to the low amount of light available in the home. This is a problem: high consumption - low energy production. Help your Indoor bonsai through a very bright and at the same time cool location.
Indoor bonsai and air humidity
Especially indoor bonsai from tropical areas (eg. Ficus bonsai) are used to high humidity and need it. Our apartments are too dry. The humidity in a normal apartment is significantly lower. However, you can increase the humidity for your Indoor bonsai slightly by placing a drip tray underneath, which is filled with some water.
Indoor Bonsai - Irrigation
Bonsai are living creatures. They have certain needs. And they vary depending on the environmental conditions. An indoor bonsai in summer on the balcony needs much more water than the same bonsai in winter in the room. On hot days, more water needs to be poured. Also on windy days. It's important when watering: Never pour all together. Most bonsais don't like too much water or too little. The healthy middle is usually right. Tip: Simply place your flat hand on the surface of the earth. If it feels damp, it usually does not need to be poured.
Fertilization of indoor bonsai
Fertilization only makes sense if the indoor bonsai can do something with the fertilizer. Ie. in winter, when their room bonsai hardly grows due to lack of light, they hardly need fertilizers. As a general rule: fertilise indoor bonsai during the growing season from March to September. And then, let's do it properly and fertilize abundantly. The usual Bonsai liquid fertilizers and organic solid fertilizers like Biogold are practical, safe and effective. It doesn't matter which one you take. They're comparable.