how to seal drainage holes in plastic pots

How to Seal Drainage Holes in Plastic Pots

Plastic pots are an excellent choice for container gardening because they are affordable and come in all shapes and sizes. One downside of these pots is that they do not hold water well. To help prevent water from running through the pot and out of the drainage holes, it is important to properly seal them. Here is how to do it.

Steps to Sealing Drainage Holes in Plastic Pots

  • Clean the Pot: Start by wiping away any dirt or debris that is stuck to the bottom of the pot. Make sure the area is completely dry before moving on to the next step.
  • Add Materials to the Hole: The materials you use will depend on what you have access to. Some popular options are:

    • Coffee Filters
    • Cotton Balls
    • Fabric Scraps

    However, if you want something more heavy-duty, you can use a combination of soil and peat moss.

  • Cover with Tape: To completely seal the drainage holes, cover the area with a layer of tape. You can use duct tape if you’re looking for something more durable, but regular packing tape is a good option as well.

Additional Tips

  • Choose the Right Pot: If you are working with plants that need a lot of moisture, it is best to avoid plastic pots with drainage holes altogether. Instead, look for self-watering pots or ones with built-in reservoirs like aquaponics systems.
  • Be Cautious When Watering: Once you have sealed the drainage holes, it is important to be careful when watering your plants. Overwatering can cause the soil and peat moss to expand, which can lead to the tape ripping off. If this happens, you will need to seal the holes again.


Sealing drainage holes in plastic pots is a simple task, but an important one. Taking the time to do this will help keep your plants healthy and thriving for years to come.

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