DIY Guide: Make Geometric Concrete Planters Easily

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In this DIY guide, I will show you how to make geometric concrete planters easily. You don’t need any advanced skills or expensive materials to create these modern and stylish planters. With just some cardboard, tape, and concrete mix, you can make a variety of shapes and sizes. Let’s get started!

Key Takeaways:

  • Learn how to make geometric concrete planters using simple materials.
  • Create unique and modern planters to enhance your home or outdoor space.
  • Experiment with different shapes and sizes to showcase your creativity.
  • Enjoy the satisfaction of crafting something with your own hands.
  • Add a touch of nature to your surroundings with DIY concrete planters.

Materials Needed for DIY Concrete Planters

To make these geometric concrete planters, you will need a few materials. Here’s a list of what you’ll need:

Concrete mix
Ruler and pencil
Bucket and water

To create your DIY concrete planters, it’s important to gather all the necessary materials. Let’s take a closer look at what you’ll need:

  1. Concrete mix: Choose a fine concrete mix without pebbles or stones. This will give your planters a smooth finish.
  2. Cardboard: Thin hobby cardboard works well for creating the mold. It should be easy to bend and fold.
  3. Tape: Clear packaging tape is used to seal the mold and prevent water from reaching the cardboard.
  4. Ruler and pencil: These tools will help you measure and draw the shape of the mold accurately.
  5. Bucket and water: You’ll need a bucket to mix the concrete in and water to create the right consistency.
  6. Scissors: Used to cut out the cardboard mold in the desired shape.
  7. Plant: Don’t forget to choose a plant to put in your finished planter! Select one that suits your style and the size of your planter.

By gathering these materials, you’ll be prepared to start the process of creating your own unique DIY concrete planters. Let’s move on to the next section to learn how to create the mold for these stylish planters.

Creating the Mold for Geometric Concrete Planters

The first step in making geometric concrete planters is creating the mold. To do this, you’ll need thin hobby cardboard that can be easily bent and folded. Start by deciding the shape of your planter and drawing it onto the cardboard. Cut out the shape and fold along the creases to create the mold. Reinforce the mold with clear tape to ensure it holds its shape and prevents water from reaching the cardboard.

Materials Needed Step-by-Step Instructions
Thin hobby cardboard
  • Decide the shape of the planter and draw it onto the cardboard.
  • Cut out the shape of the planter from the cardboard.
  • Fold along the creases to create the mold.
  • Reinforce the mold with clear tape to ensure it holds its shape.

Pro tip: Be sure to measure and cut accurately to achieve the desired shape for your planter. Reinforcing the mold with tape will ensure it stays intact during the concrete pouring process.

Creating a mold for DIY concrete planters

“The mold is the foundation of your concrete planter design. Take your time in creating a sturdy and accurate mold to ensure the best results.” – Concrete Crafting Magazine

Preparing the Inner Mold for DIY Concrete Planters

Creating the inner mold is an essential step in making geometric concrete planters. This mold is what will create the space for your plant to grow and thrive. Here’s a step-by-step guide on how to prepare the inner mold:

  1. Measure the width and height of your plant: Before you start constructing the inner mold, you need to know the dimensions of your plant. Use a ruler or measuring tape to accurately measure the width and height of your plant.
  2. Add an extra centimeter to the measurements: To ensure that your plant has enough space to grow comfortably, add an additional centimeter to both the width and height measurements.
  3. Draw the shape onto the cardboard: Using a pencil and ruler, draw the shape of the inner mold onto the cardboard. You can create a geometric shape that complements the design of your concrete planter.
  4. Cut out the shape: Carefully use scissors or a craft knife to cut out the shape that you drew on the cardboard. Take your time to ensure clean and precise cuts.
  5. Waterproof the inner mold with tape: To protect the inner mold from moisture, apply strips of waterproof tape to the inside of the cardboard shape. Make sure that all edges and surfaces that will come into contact with the wet concrete are covered with tape.

Once you have prepared the inner mold, it will be ready to be placed inside the outer mold and filled with concrete. The inner mold creates the perfect space for your plant, allowing it to grow and thrive in its new geometric concrete planter.

For visual reference, here’s an image of the inner mold being prepared:

Preparing the inner mold for DIY concrete planters

“The inner mold is what creates the space for the plant in your concrete planter.”

Now that the inner mold is ready, we can move on to the next step in the process: mixing and pouring the concrete for your geometric planters. Stay tuned for the next section!

Mixing and Pouring the Concrete for Geometric Planters

Once your molds are ready, it’s time to mix and pour the concrete. Proper mixing and pouring techniques are essential for achieving sturdy and well-formed geometric planters. Follow these steps to ensure successful results:

  1. Mixing the Concrete:
  • Follow the instructions on the concrete mix package to create the right consistency. Different brands may have specific guidelines, so be sure to read and follow them carefully.
  • Start by pouring the dry mix into a clean bucket or container.
  • Add water gradually while mixing with a trowel or mixing tool. Aim for a thick, but pourable consistency, similar to pancake batter.
  • Continue mixing until all the dry mix is incorporated and you achieve a smooth, homogeneous texture.
  • Removing Stones:
  • Before pouring the concrete, inspect the mixture for any stones or pebbles. Remove them to ensure a smooth surface finish.
  • Pouring Into the Outer Mold:
  • With your outer cardboard mold prepared, place it on a flat, stable surface.
  • Slowly pour the mixed concrete into the outer mold, filling it up to about 3/4 full.
  • Use a trowel or your hands to spread and level the concrete, ensuring it reaches all corners and edges of the mold.
  • Placing the Inner Mold:
  • Carefully insert the inner mold into the concrete, ensuring it is centered and leaving a small gap from the bottom.
  • The inner mold creates the space for the plant and adds a unique design element to your geometric planter.
  • Double-check the alignment and position of the inner mold, making any necessary adjustments before proceeding.
  • Tapping and Removing Air Bubbles:
  • Tap the outer mold gently on a solid surface to remove any air bubbles trapped within the concrete.
  • This step helps ensure that the concrete is evenly distributed and minimizes the presence of air pockets.

Mixing and Pouring the Concrete for Geometric Planters

Following these steps will help you achieve the desired shape and consistency of your geometric planters. Take your time during the mixing and pouring process to ensure accuracy and precision. Now that the concrete has been poured, it’s time to move on to the next step: drying and removing the molds.

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Drying and Removing the Molds

After pouring the concrete, the molds need time to dry and harden. The drying time for concrete planters can vary depending on the type of concrete used. However, it is generally recommended to leave the molds undisturbed for a minimum of 12-24 hours. This allows the concrete to set and achieve the desired hardness.

To determine if the concrete is ready for removal, gently touch the surface. If it feels dry and hard to the touch, it is likely that the concrete has sufficiently cured. Keep in mind that drying time may be affected by factors such as temperature and humidity, so it’s always a good idea to check the hardness of the concrete before proceeding.

When the concrete is dry and hardened, it’s time to remove the molds. Carefully peel off the cardboard molds from the concrete, taking care not to disturb or damage the planter. Start by loosening the edges and gradually work your way around the mold until it is completely detached. The smooth surface of your geometric concrete planter will be revealed once the molds are removed.

Drying and Removing the Molds

Recommended Drying Times for Different Concrete Types

Concrete Type Minimum Drying Time
Standard Concrete Mix 12-24 hours
Rapid-Setting Concrete Mix 4-6 hours
High-Strength Concrete Mix 24-48 hours
Self-Leveling Concrete Mix 24-36 hours

It’s important to note that the drying time may vary depending on the specific brand and instructions of the concrete mix you are using. Always refer to the manufacturer’s guidelines for the most accurate drying time.

Sanding and Finishing the Concrete Planters

To achieve a smooth surface on your DIY geometric concrete planters, sanding is crucial. This step helps to refine the texture and create a polished finish. Follow these steps to sand and finish your concrete planters:

Sanding the Concrete

Start by using rough-grit sandpaper, such as 80 or 100 grit, to sand the surface of the planter. Apply gentle pressure and move the sandpaper in circular motions or back and forth to smooth out any imperfections, rough edges, or uneven areas. Be sure to sand all sides of the planter for a uniform finish.

Tip: Remember to wear protective gloves and a dust mask to avoid inhaling any dust particles.

After sanding with the rough grit, switch to a finer-grit sandpaper, such as 220 or 320 grit. Repeat the sanding process with the finer grit to further refine the surface and achieve a smoother texture. Keep sanding until the concrete feels smooth to the touch.

Gluing a Wooden Top

For an added decorative touch, you can attach a wooden top to your concrete planter. Choose a wooden piece that complements the overall design and style. Apply wood glue to the bottom of the wooden top and carefully position it on the planter, ensuring it sits flush with the concrete surface.

Sanding the concrete

Adding Finishing Touches

Once the wood glue has dried, you can add soil and your chosen plant to complete the finished look of your DIY geometric concrete planter. Select a plant that thrives in the conditions you’ll be providing and matches the size of your planter.

Remember to water your plant adequately and provide appropriate sunlight based on its specific needs. With proper care, your geometric concrete planter will not only serve as a stylish home for your plant but also as a unique conversation piece.

Tips and Tricks for Making DIY Concrete Planters

When it comes to making your own DIY concrete planters, there are a few tips and tricks that can help you achieve the best results. From measuring accurately to experimenting with drying times, here are some useful techniques to consider:

1. Measure Accurately

One of the most important aspects of creating DIY concrete planters is measuring accurately. Take precise measurements to ensure that your cardboard mold fits together properly. This will help you achieve the desired shape and size for your planters.

2. Seal Molds with Tape

To prevent water from reaching the cardboard and causing damage, it’s essential to seal the molds with tape. Use clear packaging tape to create a watertight seal on the inside of the mold. This simple step will help ensure that your planters are durable and long-lasting.

3. Remove Air Bubbles

Air bubbles can sometimes become trapped in the concrete, resulting in an uneven or rough surface. To remove air bubbles, tap the molds gently or use a vibrating tool. This will help the concrete settle evenly and create a smoother finish for your planters.

4. Experiment with Drying Times

The drying time can affect the texture of the concrete in your planters. If you prefer a smoother finish, leave the molds to dry for a longer period. Conversely, if you want a rougher texture, reduce the drying time slightly. Experimenting with different drying times will allow you to achieve the desired look for your planters.

By following these tips and tricks, you can create beautiful and unique DIY concrete planters. Remember to measure accurately, seal the molds with tape, remove air bubbles, and experiment with drying times to achieve the best results.

Tip Description
Measure Accurately Take precise measurements to ensure your mold fits together properly.
Seal Molds with Tape Use clear tape to create a watertight seal on the inside of the mold.
Remove Air Bubbles Tap the molds or use a vibrating tool to remove any trapped air bubbles.
Experiment with Drying Times Adjust the drying time to achieve the desired texture of the concrete.

Styling and Displaying Your Geometric Concrete Planters

Geometric concrete planters are the perfect addition to enhance your modern home decor. The clean lines and sleek design of these planters add a contemporary touch to any space. When it comes to styling and displaying your geometric concrete planters, there are several key factors to consider.

Selecting Plant Types and Sizes

One of the best ways to create a dynamic look with your planters is by incorporating different plant types and sizes. Consider mixing and matching plants with varying heights, textures, and colors to create visual interest. The combination of tall and trailing plants in different geometric planters can create a stunning focal point in your space.

Plant Type Size Placement
Succulents Small On shelves or windowsills
Ferns Medium On a plant stand or coffee table
Bamboo Tall Corner of the room or near a window

Table: Sample plant types and placement ideas for styling geometric concrete planters.

Mixing and Matching Sizes and Shapes

Another approach to styling your geometric concrete planters is by mixing and matching different sizes and shapes. This creates a visually appealing display that adds depth and dimension to your space. You can experiment with combining square, triangular, and cylindrical planters to create a unique arrangement. Consider using a variety of sizes, ranging from small to large, to create a graduated effect.

Indoor and Outdoor Display

Geometric concrete planters are versatile and can be used indoors or outdoors. These planters add a touch of greenery and sophistication to any room or outdoor area. Use smaller planters on shelves, mantels, or windowsills to add a pop of style to your indoor space. For outdoor areas, place larger planters on your patio or balcony to create a focal point or line them along a garden path for a dramatic effect.

Styling and Displaying Geometric Concrete Planters

Image: Example of styled geometric concrete planters in a modern home setting.

Creating a Cohesive Look

When styling and displaying your geometric concrete planters, aim for a cohesive look that complements your overall home decor. Consider the color palette, materials, and design elements in your space and choose planters that align with these features. For a minimalist look, opt for neutral-colored planters with clean lines. If your home has a more bohemian or eclectic vibe, consider colorful planters with intricate designs.

“By incorporating different sizes, shapes, and plant types, you can create a visually stunning display that showcases your personal style and adds a touch of nature to your space.”

With these styling tips in mind, you can now create a captivating display of your geometric concrete planters that elevates your modern home decor. Whether you create a symmetrical arrangement or go for an asymmetrical look, the possibilities are endless. Get creative, have fun with the process, and let your personal style shine through.

Benefits of DIY Concrete Planters

Making your own concrete planters offers several benefits. Firstly, it is a cost-effective way to add modern and unique planters to your collection. Instead of buying expensive planters from stores, you can create your own at a fraction of the cost. Not only will you save money, but you’ll also have the satisfaction of crafting something with your own hands.

Customization options are another advantage of DIY concrete planters. When making your own planters, you have the freedom to choose the size, shape, and design that best suits your preferences and fits perfectly in your space. Whether you prefer sleek and minimalist styles or intricate and detailed designs, the possibilities are endless.

DIY concrete planters are known for their durability. Concrete is a sturdy and long-lasting material that can withstand various weather conditions. These planters are built to last, ensuring that your plants will have a stable and reliable home for years to come. You won’t have to worry about frequent replacements or repairs.

One of the most appealing aspects of DIY concrete planters is the opportunity to create unique designs. Concrete is a versatile material that can be molded, textured, and customized in countless ways. You can experiment with different techniques and materials to achieve distinctive patterns, textures, and finishes. Let your creativity guide you as you explore the endless possibilities of concrete planters.

With their cost-effectiveness, customization options, durability, and potential for unique designs, DIY concrete planters are an excellent choice for anyone who wants to add an element of style and greenery to their space.

Inspiration for Using Geometric Concrete Planters

Geometric concrete planters are a versatile addition to any indoor or outdoor space. With their modern and stylish design, they can transform the look of your plants and add an aesthetic touch to your surroundings. Here are some inspiring ideas for using geometric concrete planters:

Indoor Plant Arrangements

Create captivating indoor plant arrangements by placing small succulents or cacti in individual geometric planters. These low-maintenance plants thrive in the dry conditions often found indoors and can add a touch of greenery to any room. Arrange the planters on shelves or windowsills to create a visually appealing display that brings nature into your home.

Outdoor Garden Displays

Take your outdoor garden to the next level by incorporating geometric concrete planters into your display. Combine different shapes and sizes of planters to create a focal point in your garden or patio. Arrange them strategically to highlight your favorite plants or to organize a herb garden. The geometric design of the planters adds an interesting dimension to your outdoor space and allows you to showcase your creativity.

Whether you use them indoors or outdoors, geometric concrete planters offer a unique way to display your plants and add a modern touch to your surroundings. Get inspired and experiment with different arrangements to create a stunning and personalized display!

Maintenance and Care for Geometric Concrete Planters

Concrete planters require minimal maintenance, but with a few care tips, you can prolong their lifespan and keep them looking their best. Here are some essential maintenance and care guidelines for your geometric concrete planters:

Cleaning Tips

To keep your planters clean and free from dust and dirt, simply wipe them with a damp cloth. This removes any buildup and restores their original appearance. Avoid using harsh chemicals or abrasive cleaners, as they can damage the concrete surface. A gentle cleaning method is all you need to maintain the beauty of your planters.

Preventing Water Damage

Proper drainage is essential to prevent water damage to your concrete planters. Ensure that there are drainage holes at the bottom of the planters to allow excess water to escape. Overwatering can lead to water accumulation, which may weaken the concrete over time. By avoiding overwatering and providing adequate drainage, you can protect your planters from water damage and maintain their structural integrity.

Protecting from Extreme Temperatures

Concrete planters can be sensitive to extreme temperatures. It is advisable to bring your planters indoors during freezing conditions to prevent cracks or damage caused by the expansion of water when it freezes. Similarly, excessive heat can also affect the integrity of the concrete. If you live in an area with intense heat, consider providing shade for your planters to protect them from direct sunlight and extreme temperatures.

Maintenance and Care for Concrete Planters

Taking these maintenance and care measures will ensure that your geometric concrete planters remain in excellent condition and continue to enhance your space for years to come. By cleaning them regularly, preventing water damage, and protecting them from extreme temperatures, you can enjoy the beauty of your planters and the plants they hold throughout each season.


Creating your own geometric concrete planters is a rewarding and affordable DIY project that allows you to add a modern touch to your home or outdoor space. With just a few materials and some creativity, you can craft unique planters that reflect your personal style and enhance the natural beauty of your surroundings.

By following the step-by-step guide outlined in this article, you can easily make your own modern planters without the need for advanced skills or expensive materials. The process of creating the molds, mixing and pouring the concrete, and removing the molds may require some patience and attention to detail, but the end result is well worth the effort.

Once your geometric concrete planters are dry and ready, you can sand them to achieve a smooth finish and even add a wooden top for a decorative touch. These versatile planters can be styled and displayed in various ways, both indoors and outdoors, allowing you to experiment with different plant types and arrangements to create a visually stunning display.

So why wait? Start your DIY journey today and bring a touch of nature and modernity into your space with your very own geometric DIY concrete planters. With these easy-to-follow steps, you’ll be able to enjoy the satisfaction of creating something unique while beautifying your surroundings. Get creative, have fun, and let your imagination flourish!


What materials do I need to make DIY concrete planters?

You will need concrete mix, cardboard, tape, ruler, pencil, bucket, water, and scissors.

How do I create the mold for geometric concrete planters?

Start by drawing the shape of your planter onto thin hobby cardboard, then cut out the shape and fold along the creases to create the mold. Reinforce the mold with tape to ensure it holds its shape.

How do I prepare the inner mold for DIY concrete planters?

Measure the width and height of your plant, add an extra centimeter, and draw a shape onto cardboard using these measurements. Cut out the shape, then waterproof the inner mold by applying tape to the inside.

How do I mix and pour the concrete for geometric planters?

Follow the instructions on the concrete mix package to create the right consistency. Pour the concrete into the outer mold, filling it up to about 3/4 full. Then, insert the inner mold into the concrete, making sure it is centered.

How long do the molds need to dry before removing them?

The drying time will vary, but it is usually recommended to leave the molds for at least 12-24 hours. Check the hardness of the concrete by touching it gently, then carefully peel off the cardboard molds.

How do I sand and finish the concrete planters?

Use sandpaper to sand the surface of the planters, starting with a rougher grit and gradually moving to a finer grit. Sand any rough edges or imperfections until the surface is even and polished.

What are some tips and tricks for making DIY concrete planters?

Measure accurately, seal the molds with tape, remove air bubbles, and experiment with drying times for different textures.

How should I style and display my geometric concrete planters?

Incorporate different plant types and sizes, mix and match shapes and sizes, and use them indoors or outdoors to enhance your space.

What are the benefits of DIY concrete planters?

They are cost-effective, customizable, durable, and offer endless design possibilities.

What are some ideas for using geometric concrete planters?

You can use them for indoor plant arrangements, outdoor garden displays, succulent containers, and herb gardens.

How do I maintain and care for my geometric concrete planters?

Clean them with a damp cloth, avoid harsh chemicals, prevent water damage, and protect them from extreme temperatures.

What is the conclusion for DIY concrete planters?

Creating modern and stylish planters is an easy and affordable DIY project that allows you to bring a touch of nature into your surroundings.

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