Mabo, If the pot looks large enough for the plant
, and the plant
can go more than a couple of days between waterings, it probably is large enough. Sometimes stray roots wander out of drainage holes even if the plant
isn't rootbound. If you plant
is otherwise happy and healthy, I wouldn't worry about it.
Tipping is sometimes caused by mineral build up. Tap water and some well waters frequently have high mineral concentrations. If this your situation, you might want to switch to bottled or filtered water, or rain water (unless acid rain is problematic in your area).