Question: Fertilizer

What kind of fertilizer would you recommend? And my bonsai has not had the leaves for about 2 months and normal?

Answer: Manure

Dear Annamaria,
there are several top quality bonsai fertilizers on the market, choose a special one for your plant.
The fact that it has no leaves is not very reassuring, but it depends on the type of plant, where you keep it; perhaps with some greater indication it is possible to give you some further information.