DIY Self Watering Planter: Never Kill Your Plants Again

Tired of coming home to wilted, sad-looking plants? A self watering planter might be exactly what you need. These clever containers create a reservoir of water that your plants can access as needed, keeping them perfectly hydrated for days or even weeks without your intervention. Perfect for busy schedules, frequent travelers, or anyone who’s accidentally turned their green friends into brown memories.

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The best part? You can make your own DIY self watering planter with simple, affordable materials in just an afternoon. No special skills required—just follow our straightforward guide below. You’ll save money compared to store-bought versions while creating a custom solution for your specific plants and space.

Materials You’ll Need for Your DIY Self Watering Planter

Before you begin, gather these supplies. Most are available at your local hardware store, or you can find them online. I’ve included Amazon search links for your convenience.

• Large plastic container with lid (no drainage holes) – Find on Amazon
• 1½” PVC pipe (length depends on your container height) – Find on Amazon
• Small plastic pot or pond basket (for the “soil foot”) – Find on Amazon
• Landscape fabric or weed barrier – Find on Amazon
• Quality potting mix for container gardening – Find on Amazon
• Drill with ¼” drill bit
• Utility knife or hacksaw
• Scissors
• Marker or pencil
• Measuring tape
• Optional: Vermiculite and peat moss (2:1 ratio) for better wicking – Find vermiculite and peat moss on Amazon

How Self Watering Planters Work: The Science Behind the Magic

Before we dive into construction, let’s understand how a self watering planter actually works. The system has three main components:

1. Water Reservoir: A space at the bottom of the container that holds water.
2. Wicking System: A “soil foot” or wick that draws water up from the reservoir into the soil above.
3. Separation Layer: A barrier with holes that keeps most of the soil above the water while allowing the wicking system to pass through.

The magic happens through capillary action—the same process that pulls water up through plant roots. As your plant uses moisture from the soil, the dry soil pulls water up through the wick from the reservoir below, maintaining perfect moisture levels without waterlogging. It’s like giving your plants the ability to drink exactly when they’re thirsty!

Step-by-Step Guide to Building Your Self Watering Planter

Step 1: Prepare Your Container

Start by selecting a container that’s deep enough to create both a water reservoir and a planting area. The container should not have any drainage holes, as we’ll be creating a controlled system.

• Measure about ¼ to ⅓ of the height from the bottom—this will be your water reservoir.
• Mark this height around the container with a marker.
• Drill a small overflow hole (about ¼”) at this marked line. This prevents overwatering by allowing excess water to drain out when the reservoir is full.

Step 2: Create the Separation Layer

The separation layer divides your water reservoir from the soil while allowing the wicking system to pass through.

• Take the lid of your container and cut it to fit inside the container at your marked reservoir height line.
• Cut a hole in the center of this modified lid large enough to fit your small plastic pot or pond basket.
• If using a rectangular container, cut a small notch in one corner for the PVC pipe to pass through.

Step 3: Prepare the Watering Pipe

The watering pipe allows you to refill the reservoir without disturbing your plants.

• Cut your PVC pipe to a length that will reach from the bottom of your container to about 1-2 inches above the top.
• Cut a 45-degree angle at the bottom end of the pipe to prevent it from sitting flat against the container bottom.
• Optional: Cover the bottom opening with landscape fabric secured with a rubber band to prevent soil from entering.

Step 4: Create the Wicking System

The wicking system is the heart of your self watering planter—it’s what draws water up to your plants’ roots.

• Take your small plastic pot (make sure it has drainage holes) or pond basket.
• If using a pot with few holes, add more by carefully drilling or poking additional holes around the sides.
• Fill the pot with slightly moistened potting soil, packing it firmly.
• For even better wicking, use a 2:1 mixture of vermiculite and peat moss in this pot instead of regular potting soil.

Step 5: Assemble the Planter

Now it’s time to bring all the pieces together:

1. Place your modified container lid (separation layer) inside the container, resting at your marked line.
2. Insert the wicking pot through the center hole so it touches the bottom of the container.
3. Position the PVC pipe through the corner notch, ensuring it reaches the bottom.
4. Line the top portion with landscape fabric to prevent soil from falling into the reservoir. The fabric should cover the separation layer but allow the top of the wicking pot to remain exposed.

Step 6: Add Soil and Plant

With your self watering system assembled, it’s time to add soil and plants:

• Fill the container with quality potting mix up to about 1 inch below the rim.
• Make sure the soil connects well with the soil in the wicking pot for proper moisture transfer.
• Plant your chosen plants as you normally would, being careful not to damage the watering pipe.
• Water thoroughly from the top for initial planting to help establish roots.

Step 7: Fill the Reservoir and Maintain

Your DIY self watering planter is now ready to use:

• Pour water through the PVC pipe until you see water coming out of the overflow hole.
• For the first week, also water from the top to help establish plants.
• After that, simply refill the reservoir when needed—typically every 3-7 days depending on plant type, container size, and weather conditions.
• Check the soil moisture occasionally by inserting your finger about 2 inches into the soil—it should feel consistently moist but not soggy.

Optional Upgrade: Adding an Aeration System

For even healthier plants, consider adding a simple aeration system to your water reservoir. This prevents stagnant water and provides oxygen to plant roots.

Run the pump for a few hours each day to keep the water fresh and oxygenated. This is especially beneficial for plants with high water needs or in warm climates where water can become stagnant quickly.

Best Plants for Your DIY Self Watering Planter

Not all plants are equally suited for self watering planters. Here are some recommendations based on water needs:

For vegetables and fruiting plants, choose determinate or compact varieties that won’t outgrow your container. If you’re growing multiple plants in one container, make sure they have similar water requirements.

Maintaining Your DIY Self Watering Planter

Your DIY self watering planter needs minimal maintenance, but these tips will keep it functioning optimally:

Fertilizing Your Self Watering Planter

Since nutrients can be depleted faster in self watering systems, proper fertilization is important:

• Use water-soluble fertilizer at half strength when filling the reservoir.
• Alternatively, mix slow-release organic fertilizer into the top few inches of soil.
• Avoid putting fertilizer directly into the reservoir without dilution, as this can lead to salt buildup and harm roots.
• Every 2-3 months, flush the system with clean water to remove any mineral buildup.

Troubleshooting Common Issues

Share Your DIY Self Watering Planter on Pinterest

Ready to share your creation with the world? Here are some tips for capturing your DIY self watering planter for Pinterest:

Perfect Pinterest Boards for Your DIY Planter

Frequently Asked Questions About DIY Self Watering Planters

Start Enjoying the Benefits of Your DIY Self Watering Planter

Congratulations! You’ve successfully created your own DIY self watering planter that will keep your plants happy and hydrated with minimal effort from you. This simple system works with the natural processes of plants to provide consistent moisture exactly when needed.

Remember that different plants have different water needs, so observe how your plants respond and adjust accordingly. The beauty of this system is its flexibility—you can easily modify it for different plants, container sizes, or growing conditions.

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