You can increase the humidity near your bonsai by placing it in a moisture tray filled with water and spraying it several times a day. You can also circulate air from outside, opening a window during the day. The most important rule is to never water in a routine. When watering bonsai, the main goal is to completely saturate the root system with water.
To ensure adequate saturation, continue watering until water escapes through the drain holes. To allow proper drainage, many bonsai trees come with a tray to collect excess water. Keeping the tree in a drip tray will allow some water to remain under the pot. This will slowly evaporate and increase the moisture level around the tree.
WATERING Watering your bonsai should never be neglected. Apply water when the soil appears dry; never allow the soil to dry completely. If your bonsai is getting full sun, you may need to water once a day. This schedule may vary depending on the size of the pot, the type of soil, and the type of bonsai tree you own.
Evaluate the water needs of each tree and adjust its irrigation schedule to suit it. It's a good idea to use a moisture meter until you know your bonsai requirements. Watering should be done with a watering can or hose fitting that should dispense the water in a way that is gentle enough not to disturb the soil. Water should be applied until it starts to flow out through the holes in the bottom of the pot.
A good rain is usually enough to water. If you're leaving for a week or less, place the bonsai in the kitchen sink with water covering half of the pot. Tropical and subtropical trees used for bonsai will require periodic pinching and trimming throughout the year. Successful bonsai cultivation in an indoor environment would require choosing a low-light tolerant bonsai species or providing artificial lighting.
I think you need to determine what variety of bonsai you have: People often buy bonsai outdoors and keep them indoors, which will dramatically affect bonsai. The quality and health of the trees in these places will generally be much better than those at “bonsai stalls” or vendors who fly at night. Dear Robert, You need to use good bonsai soil like Akadama or mix some soil with John Innes compost mixed with horticultural sand. You have the right idea: if you want to leave some water in the tray, this helps keep the humidity around the bonsai, this is especially good when the central heating is turned on.
It's good to know that you can create beautiful bonsai styles and display them indoors for your family and friends to see. Castro also encourages shoppers to avoid what he calls mall-sai trees (bonsai trees found in shopping malls and large box stores). If you've been watering, place the bonsai in the kitchen sink with the irrigation covering the soil for at least 30 minutes. Once outside, the bonsai should be placed where it gets enough sun; the best thing is the morning sun and the afternoon shade.
Of course, caring for a bonsai indoors is holistic, considering all aspects of care and not just focusing on one aspect. Bonsai cultivation remains a specialized niche, but with the help of books, YouTube tutorials, and dozens of public collections, learning the art of bonsai is more accessible than ever. Because your bonsai is a miniature living tree, it will increase in beauty as it matures over the years.