As long as they are big pots should be ok. I wouldn't water daily tho'. A good soaking once or twice a week allowing them to dry out in between is far better. They may have used up their composts food - so have you tried feeding them?

How big are the pots?

Push a bbq wooden skewer into the growing medium down to the roots and leave it for five minutes. Remove the skewer, if its damp/wet don't water, if it's dry water. Never fertilise onto dry compost - thoroughly water first and wait 20 mins before feeding.

oops!