When you've determined that the soil is slightly dry and the tree needs water, make sure to thoroughly soak the entire root system. Keep watering until water runs out of the bottom drainage holes, and possibly repeat the process a few minutes later.
Bonsai we recommend using a relatively high Nitrogen content fertilizer like NPK 10:6:6. in spring, a more balanced fertilizer like NPK 6:6:6 is more optimal for summertime, and a low Nitrogen fertilizer like NPK 3:6:6 for autumn.
What kind of light does a bonsai tree need? Bonsai require bright UV light and benefit most when being kept outdoors in direct sunlight. Artificial grow lights such as LEDs are a great option for keeping bonsai indoors so long as they contain the full light spectrum of red and blue light.
They prefer temperatures from 64 to 75 degrees Fahrenheit during the day and between 57 and 61 degrees Fahrenheit at night. This temperature range is actually the normal indoor temperature during the winter in most homes. Growers should avoid cold bonsai feet and roots.
On average bonsai are repotted every two to three years. If you see the roots circling around the root system your bonsai needs to be repotted