This thermal treatment converts the water inside the rock to gas. Cover the holes during watering. An inch in diameter is a good place to start. Without good drainage in pots with healthy plants, roots can suffocate, root rot (see my fixes) can become an issue and salt can accumulate to levels high enough to burn plants.suffice to say, it’s essential that any potted plants, either indoor plants or container plants in your garden, must have sufficient drainage for best growth, health and ultimately, be able to live longer. Use a liner with drainage holes that is one or two sizes smaller than the clay pot.
