i’ve had this chinese elm for about 5 years. it suddenly isn’t happy at all with anything i do. but it totally refuses to die which is amazing! this spring it’s put out some new growth and new branches at a crazy fast rate. i feel like it could be so much happier but i don’t know what to do anymore. is there a particular soil it prefers? it has a fairly rocky and barky bonsai soil, good light, and i fertilize it.