I'm new to the forum but have been reading very helpful tips from here about growing bonsai. I bought 2 pre-bonsai, a Fukien Tea and a Jade, about a month ago and they seem to be doing well.
The Fukien Tea pre-bonsai came with a tonne of mealy bugs but I managed to get rid of it and the new leaves are looking great.
The Jade Tree pre-bonsai obviously needs pruning and, here some tips on how one should start pruning/wiring would be great.
However, both pots have developed a thin layer of yellowish mould. I suspect it's a matter of not letting the soil dry out more between each watering session? But I do wait til the soil is rather dry. The soil drains well. Also, I've read that Fukien Tea trees tend to like slightly moist soil so I try not to let it dry out too much. From what I've gathered through reading, it seems that the yellowish mould might not be harmful, so should it be left alone?
I have not re-potted them since getting them. They sit by the west-facing window so they get a lot of afternoon sun. I've attached pictures with this post and any advice or tips on better care would be appreciated.