If you used the right potting soil, the most likely reason is you over-water the plant

Specky krmm in Singapore  

Fit plain jane jp mama to be    

Aiyo.... all those short skill future courses really useless..... can learn from youtube videos and do experiments to finetune gardening skills.   But plants still died in my hands despite my efforts and given best environment.  Even lazy person's plant (cactus can died with 1 month)  

@Cybertan speckies are the best