Sooner or later a healthy, growing houseplant is going to out grow its pot. When a plant gets too large for its pot, the roots circle around inside the pot and start to restrict themselves. If your plants seem to dry out more quickly than they used to, but are otherwise healthy, they are probably pot bound. There are simply too many roots in the pot and not enough soil is left to hold and distribute water.
This is an easy problem to fix. Repot your houseplant into a pot an inch or two larger. Don’t try to go too large, as too much soil means the roots will be sitting in damp conditions and the roots will begin to rot.
