How to Make Planter Molds: Best Silicone and Plastic Molds for DIY Flower Pots (2026)

The catin Concrete Planter Molds set offers a straightforward way to cast your own small round and square planters from concrete, cement, clay, or plaster. Designed for DIY enthusiasts who enjoy handcrafting home decor, these molds make it easy to create customized succulent pots, candle containers, or desk organizers without investing in expensive equipment.

Each mold features a flexible silicone inner lining that releases cured projects with minimal effort. The included plastic frame adds rigidity during casting, preventing the walls from bulging outward, which is a common issue with softer molds. The finished planter measures 3.15 inches in both diameter and width with a 2.5-inch depth, ideal for small succulents or tea lights. A set of small sticks is also provided to punch drainage holes, adding practicality to your creations.

The design is minimal and functional. The silicone is smooth and easy to clean, and with a light coat of baby oil or release agent, demolding becomes even smoother. These molds are reusable many times, though they should not be used with resin as it will cure with a cloudy haze. The outer plastic frame is sturdy enough to hold the weight of wet concrete without distorting the shape.

One limitation is the size: at only about 3 inches across, you cannot make large pots. Also, the molds work best with a release agent; skipping this step may cause sticking on the first few uses. But for small-scale casting, they deliver consistent results. The set includes one round and one square mold, so you can experiment with both shapes right away.

Overall, the catin mold set is a solid buy for beginners or casual crafters wanting to dip into cement casting. It offers good value for the price, with no major flaws beyond the size restriction and the resin incompatibility. If you are looking for a simple way to make personalized small planters or containers, this kit delivers on its promise.

The PSOIRGCNH Silicone Planter Mold offers a smart solution for DIY enthusiasts who want to craft their own concrete flower pots at home. This octagonal mold combines a rigid plastic outer shell with a flexible silicone inner tank, giving you the stability of a hard mold and the easy release of a soft one. It's designed for hobbyists, home decorators, and anyone looking to make unique planters, succulent containers, or even candle holders without buying expensive equipment.

The standout feature is the double-layer structure. The outer plastic shell prevents the concrete from pushing the mold out of shape, which is a common problem with all-silicone molds. To demold, you simply apply a thin layer of oil or powder to the silicone before pouring - a tip that reviewers confirm makes removal smooth and clean. The finished planter measures 6.38 by 6.38 by 3.07 inches, a versatile size that fits succulents, small bonsai, or a few blooms.

Real-world performance is impressive. Users report getting many casts from the same mold without deterioration, and the silicone doesn't stick to colored concrete or dyed plaster. The mold also handles cement mixes with added sand and gravel, which strengthens the final pot. Several reviewers note that waiting the full 48 hours for curing yields a more durable result, and the mold's design minimizes air bubbles when the concrete is properly mixed.

There are a few things to keep in mind. The base of the mold is fairly thick - about an inch - so you'll want to avoid filling it all the way unless you need a heavy pot. Beginners may need a couple of tries to get the lubrication and mix ratio right. But overall, this is a well-made, reusable mold that delivers consistent results. If you enjoy DIY projects and want a reliable way to make modern geometric planters, this PSOIRGCNH mold is a great investment.

• Brand: PSOIRGCNH
• Material: Plastic (outer shell) and Silicone (inner tank)
• Shape: Octagonal
• Dimensions: 5.9 x 5.9 x 2.75 inches (mold); finished planter 6.38 x 6.38 x 3.07 inches
• Color: Octagonal (as listed)
• Item Type: Planter Mold
• UPC: 797427385321

The Osilifen Big Round Silicone Planter Mold is designed for anyone who wants to make their own concrete or cement flower pots at home. Whether you are a DIY beginner or a seasoned crafter, this mold simplifies the process and delivers consistent results. It is especially well suited for making modern cylinder planters for succulents, small houseplants, or as handmade gifts.

What sets this mold apart is its two-piece construction: a flexible silicone inner mold surrounded by a rigid plastic outer frame. The plastic shell keeps the concrete from bulging outward while it cures, so you get a perfectly straight-sided pot every time. The silicone part is soft and releases the cast without a fight, even if you forget to use a release agent. Many users report that the first pot came out flawlessly, and the mold shows no signs of wear after multiple uses.

In practice, the mold works with concrete, cement, plaster, resin, and clay. The finished pots measure about 5.9 inches in diameter and 4.7 inches tall, a nice size for small plants. To make the concrete stronger, the manufacturer suggests adding coarse sand and crushed stone, just like a building foundation. Users have also discovered that spraying the plastic frame with cooking oil makes disassembly much easier, and filling the inner cavity with cold water can help free a stuck core.

Build quality is solid. The silicone feels thick and resilient, and the plastic frame is sturdy enough to hold its shape under the weight of wet concrete. The mold includes a small plastic rod that can be used to create a drainage hole. However, the rod is not permanently attached, so you will need to insert it manually and hold it in place while the concrete sets. Some reviewers note that the mold can produce surface bubbles if you do not tap it while filling, and a few have seen minor dents or roughness on the cast, but these are exceptions more than the rule.

One honest drawback is that the mold does not have a built-in drainage hole. You will either need to drill one after demolding or press a plastic rod into the wet concrete before it cures. Also, the plastic frame can slide off if you are not careful when removing the silicone, so a firm grip is advised. Overall, for the price and quality, this is a reliable tool for creating custom concrete pots. It is easy to use, forgiving to beginners, and produces attractive results that look store-bought.

The Osilifen Silicone Square Concrete Mold is a well-designed tool for DIY enthusiasts who want to create custom concrete or plaster planters at home. With a 4.6-star rating from over 300 reviews, this mold kit is especially popular among succulent lovers and crafters looking for a simple way to produce modern, cube-shaped pots without investing in expensive equipment.

What sets this mold apart is its three-layer construction: a flexible silicone interior sits inside a hard plastic outer frame. The plastic shell prevents the silicone from bulging under the weight of concrete, while the silicone allows finished pieces to pop out cleanly after curing. Users consistently praise how easy it is to remove the final planter, with many noting they achieved great results on their very first attempt. The mold also includes screws and a plastic rod that lets you create a drainage hole if desired, though the rod isn't always used by everyone.

In real-world use, the mold performs well with a variety of materials - concrete, cement, plaster, resin, and even clay. Reviewers who tried quick-setting mixes like Cement All were able to demold in as little as an hour. Most report that the mold holds up after many pours, with no signs of silicone tearing or the plastic frame cracking. A few users noted that light tapping during filling helps release air bubbles, leading to smoother surfaces. The finished planter measures 3.9 inches per side, which is a practical size for a small succulent, a tea light candle holder, or a pen cup.

Build quality is solid for the price. The outer frame snaps together snugly, and the silicone interior is flexible but durable. However, a small number of buyers mentioned that the support frame can slip off if not held firmly when removing the mold, and one reviewer in Germany reported minor dents on the surface of their cast pieces. These issues seem to be exceptions rather than the rule. The mold doesn't come with a pre-made drainage hole, so you either need to drill one or use a pot inside the planter if you're growing plants.

Overall, the Osilifen Silicone Square Concrete Mold is an excellent value for anyone interested in DIY planter making. It eliminates the guesswork and frustration often associated with molding concrete, and the results are consistently attractive and functional. While it may not suit those seeking larger planters or perfect flawlessness on every pour, it's a reliable choice for beginners and experienced crafters alike who want to produce clean, cube-shaped pots without breaking the bank.

The SEWACC Planter Mold is a flexible plastic mold designed for DIY enthusiasts who want to cast their own concrete, cement, clay, or plaster planters. It's ideal for anyone from hobbyists to experienced makers looking to create custom succulent pots, decorative urns, or bonsai containers. The mold produces a large urn-shaped planter with a classic floral pattern, making it a versatile addition to your crafting toolkit.

One of the standout features is its size: at 11.4 inches in each dimension, it yields a generous planter that can hold a variety of plants. The mold is made from durable plastic that is flexible enough for easy demolding yet rigid enough to hold its shape during pours. Many users appreciate the easy assembly with multiple fasteners, though some note that the screws can loosen under the weight of concrete, so careful tightening and possibly added support are recommended.

In real-world use, the mold produces crisp, detailed results when a release agent is applied properly. Experienced users recommend using WD-40 or a commercial form release oil to prevent sticking and ensure longevity. While some reviewers had success on their first pour, others experienced leakage after repeated use, suggesting that the mold may require careful handling and cleaning between casts. Additionally, the mold lacks a built-in drainage hole, so you'll need to drill one for potted plants.

Build quality is generally good for the price. The plastic feels substantial and the floral pattern is well-defined. However, the multi-piece design (five parts) can be a bit fiddly to assemble, and some users found that the seams can allow concrete to seep out if not clamped tightly. This is not a dealbreaker but something to be mindful of, especially for beginners.

Overall, the SEWACC Planter Mold is a solid choice for DIY plant pot making. It delivers on its promise of allowing you to create custom, attractive planters with a bit of practice. If you are willing to put in the effort to learn proper release techniques and handle the mold carefully, you can achieve professional-looking results. It's not perfect - leakage and the lack of a drain hole are notable issues - but for the price and versatility, it's a worthwhile investment for your creative projects.

The Osilifen Oval Silicone Planter Mold is a practical tool for DIY enthusiasts who want to cast their own concrete flower pots. Designed for easy use, this mold combines a soft silicone interior with a rigid plastic outer casing. The result is a sturdy setup that resists bulging, even when filled with heavy concrete. It's ideal for crafters of all skill levels looking to create smooth, custom planters for succulents, herbs, or small decorative plants.

One of the standout features is the double layer construction. The silicone part provides flexibility for easy demolding, while the plastic frame holds everything in place during curing. Many users highlight how easy it is to remove the finished pot, especially when they apply a light coat of oil or release agent beforehand. The mold also breaks down into pieces held together by screws, which simplifies both pouring and cleanup. Customer reviews consistently praise the mold for producing beautiful pots with a smooth finish, though some note that tapping the sides is essential to eliminate air bubbles. A few users also mention that the mold does not include a drainage hole, but adding one is straightforward with a plastic rod or by drilling after curing.

Durability is another strong point. Several reviewers have used the mold multiple times without noticing any wear or deterioration in the silicone. The external plastic casing prevents the mold from distorting under the weight of concrete, which is a common problem with all-silicone molds. The oval shape is a unique size not often found in other molds, and the finished pot dimensions (roughly 6.5 by 3.15 by 2.95 inches) are well suited for small plants and succulents.

There are a few drawbacks worth noting. The need to tap out air bubbles is a minor inconvenience, but it's standard for this type of mold. One reviewer experienced a matte finish with their casting medium, though most report a smooth, attractive surface. Also, the lack of a pre-formed drainage hole means you'll need to plan for one if you intend to plant directly. However, these issues are common in DIY concrete molds and don't detract much from the overall value.

Overall, the Osilifen Oval Silicone Planter Mold is a well-designed, reusable tool that delivers consistent results. Its combination of a supportive frame and flexible silicone makes it forgiving for beginners while offering the precision that experienced crafters appreciate. If you're looking to add custom concrete pots to your home or garden, this mold is a solid choice that won't disappoint.

If you are new to resin casting or concrete crafts, the Heogacinlia 2-Pack Silicone Molds offer a low cost way to experiment. This set includes two round jar molds, one slightly larger than the other, ideal for making small planters, candle holders, or even jewelry storage boxes. The silicone is soft and flexible, which is great for popping out your finished piece without a struggle.

The molds deliver on clarity. The texture from the silicone transfers cleanly, so your finished casts will have distinct grooves and a smooth surface. Many buyers have used them to create succulent planters and report that the finish looks professional. The material is heat resistant, meaning you can pour both epoxy resin and concrete without worrying about the mold deforming. Cleaning up is straightforward just rinse with warm soapy water and they are ready for the next project.

However, there are some durability concerns. A few reviewers mentioned that after three or four uses the mold started to tear along the side, especially when used with resin. Other users noted a faint circle imprint on the bottom of the mold that transfers onto the cast, which can be a bother if you want a smooth bottom. The nonstick surface also seems to wear down over time, causing epoxy to stick more than it did initially. For occasional use or single castings this is less of an issue, but if you plan to mass produce pieces, these molds may not hold up long term.

On the plus side, the flexible silicone makes demolding a breeze no prying or scraping required. The two sizes give you options: the smaller mold works well for a single candle or a tiny succulent, while the larger one can hold a cluster of three small plants. Because the material is soft, storing them is easy just fold them and tuck them away. The price is hard to beat for what you get, making this a good starter set for hobbyists.

Overall, the Heogacinlia silicone mold set is a decent entry level option for DIYers who want to try resin or concrete casting without a big investment. Keep in mind that they may not last through many uses, so they are best suited for a few special projects or as a way to test out the craft before upgrading to more durable molds.

The EAIVENY Concrete Planter Mold is a DIY accessory designed for gardeners who want to craft their own cement flower pots at home. This large mold measures 7.48 by 7.48 by 8.66 inches and is made from ABS plastic, allowing for multiple uses. It is particularly suited for hobbyists who enjoy hands-on projects and prefer a custom look without the high cost of buying individual ceramic or concrete planters.

The mold features built-in buckles and comes with extra thumb screws, making assembly straightforward even for first-time users. To get the best results, you need to brush oil on the interior before each pour to prevent sticking and ease demolding. Many buyers report that the process is fun and that finished pots come out with a clean, textured surface. However, a recurring issue is the thinness of the plastic, which can lead to warping and leakage of cement at the seams, especially if the mold is not clamped tightly. Some users have successfully used silicone to seal the joints for better results.

In terms of design, the mold is lightweight and compact, which makes storage easy but also means the walls are less rigid than thicker alternatives. The finished pot is about the same size as the mold, so keep that in mind if you are looking for a large planter. A few reviewers noted that the pot is better suited for small plants or succulents rather than deep-rooted ones. The mold does not come with a drainage hole, but you can insert a pipe before the cement hardens to create one.

The main drawbacks reported include seam leakage and a final pot size that some found disappointingly small despite the product being labeled large. The price point of around forty dollars is considered high by some, given the plastic quality. That said, the mold is reusable and can produce several pots with careful handling. If you are patient and willing to tinker with the setup, you can achieve good-looking results.

Overall, the EAIVENY Concrete Planter Mold is a decent entry-level option for DIY enthusiasts who want to try their hand at making concrete planters. It is not the sturdiest choice on the market, but it does the job for small-scale projects and creative garden decorations. With extra attention to sealing and curing, you can create unique pots that add a personal touch to your garden.

Brand: EAIVENY

Item Type: Concrete Planter Mold

Material: ABS Plastic

Shape: Round

Dimensions: 7.48 x 7.48 x 8.66 inches (LxWxH)

Color: 18 Round (as per listing)

Category: Planters

Included: Mold pieces, thumb screws, buckle hardware