How often do you water? I dont water mine but maybe once a week. Cut off the damaged leaves. The top looks nice and healthy thats what makes me think its a water problem.

Looks like overwatering to me, too.
What is the soil like? How often do you water? Have you fertilized recently?

Josh

Hi, thanks a lot for the replies... I'm not very sure about over watering 'coz I don't have a fixed schedule with it, I water it when I notice that it's dry, sometimes bone dry. The pot that has the most yellow leaves was bone dry yesterday while the other 3 isn't, that's what's confusing me as when I water them, I do it in one go. I've fertilized them once, I think 2 weeks ago. I haven't changed the soil that it grew in when I purchased it more than month ago. I also googled last night, it said it might also be because it's root bound? Btw, it's on a NE location, by the kitchen window. About the watering though, how often should it be, once a week? When it's bone dry? Do I have to re-pot it? How often should it be fertilized? 10-10-10? Any replies would be greatly appreciated. Thank you very much!