That's a neat trick, hope your wife doesn't read the forum Not all tea bags compost fully so I'd be worried that the roots of the plant couldn't grow through to the soil - have you encountered this problem?
Another use for a tea bag is to drop one in the flower pot to stop compost falling out of the little hole, and also help with water saokage from below.
Not all tea bags compost fully so I'd be worried that the roots of the plant couldn't grow through to the soil - have you encountered this problem?