I bought this Mandarin tree about 2months ago I'm not too sure on the age but it was in quite a poor, unhappy state at the time. I have took care of it to the best of my ability making sure the soil stays moist throughout each week but not over watering (I water once every 7-10 days as our flat is quite warm with the central heating on) The tree is in a room with a very large window so I think it is receiving sufficient sunlight. I am worried because mold has started to appear on the soil and it has increased a lot in the last couple of days, why is there mold?! what can I do to get my tree back to a healthy condition?! your help would be really appreciated!
Also I haven't managed to find much information on a Mandarin tree in terms of the Bonsai style does anyone have any tips?
Thanks in advance