Pots without holes require special attention. They should have longer periods between watering because there is no outlet for excess water to drain. To know when to water these pots, check with your index finger as for normal watering and water when the soil feels dry.
When watering, apply just enough to wet the soil to the bottom of the con tainer. Don't overdo it! It's hard to get the water out of the bottom of a pot without holes. Apply a small amount of water. Wait a few minutes and check again. If the soil is not damp, add a little more. Continue doing this until you reach the proper moisture level. After a little practice, you will be able to judge how much water to apply.
Since it is difficult to grow plants in pots without holes, many people prefer to double pot. Put the interior plant into a pot with holes and then set it inside a decorative pot without holes. Take care to remove the excess water in the outer pot.