How Many Drain Holes Are In A Planter Box?
How Many Drain Holes Are In A Planter Box? How many drainage holes in a planter? If you have a planter that is 4-6 inches in diameter, then you just need 3-6 drainage holes where each is 1/4th inch in size. Planters that are larger than 6 inches would do well with 6-8 drainage holes