Pots Without Drainage Holes: Are They Bad, and What to Do

Is a pot without drainage holes bad?

For most plants, yes. Iowa State Extension says all containers need a drainage hole: without one the soil stays wet and roots rot and die. Illinois Extension adds that wet soil leaves little room for air around the roots, and plants rarely recover from root rot.

Why watering is guesswork without holes

With a drainage hole, water runs through the soil and out the bottom each time. Without one, UW–Madison Extension notes, it becomes guesswork: too much and roots sit in waterlogged soil, too little and the plant is drought stressed. Salts also build up on the soil surface because water can't flush through.

The double-pot (cachepot) trick

Keep the plant in a plain nursery or liner pot with holes and set it inside the decorative pot. Water so it drains through the liner, and check that the liner never sits in standing water. If water collects in the outer pot, lift the liner out and pour it off.

The gravel-layer myth

A layer of gravel in the bottom of a pot with no hole does not replace a drainage hole (Iowa State Extension). Gravel can go in the bottom of an outer decorative pot when double potting, so a little extra water collects below the liner instead of around the roots (Illinois Extension).

Should you drill a hole?

If you can, yes. Regular drill bits work on plastic; use glass or ceramic bits for terracotta, clay or ceramic. Larger pots need more holes. Some resin or plastic pots have knock-out holes to punch through.

Already planted in a pot with no holes?

Illinois Extension's fix: water it at the sink, wait a few minutes, then tip the pot on its side for a minute or two to let the extra water run out. Avoid pots with saucers you can't empty. Signs it is staying too wet are in overwatered vs underwatered, and soggy soil often brings fungus gnats.