hi, they gave me a ginseng bonsay about 1m high. I noticed that some leaves have black spots, moreover they lose several. I keep it in front of the window and I bathe it once a week, the temperature is 19-20 degrees. Can you help me?
The evergreen bonsai are in a period of vegetative rest during the winter, even if they have healthy and luxuriant leaves; for this reason, winter watering is sporadic, to be provided only when the soil in the pot is well dry. Rather the leaves are vaporized with demineralized water, to increase the humidity of the air. It may also be that your plant suffers from air blows received when you open the window.