big plastic planter boxes Winona Planter
SKU: 25751053939
big plastic planter boxes

big plastic planter boxes Winona Planter

Sale price$22.83 Regular price$25.37
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Description

big plastic planter boxes Winona PlanterWinona Ribbed Fiberglass Planter Modern Architectural Large Outdoor Indoor Tall and Wide Span Block Skinny (Narrow Depth) Elevate Your Space with Architectural Texture Fiberglass Material: Professional grade construction provides extreme durability with a high end, substantial feelengineered to be lightweight for easy installation yet heavy duty for permanent use. Structural Integrity: This long span planter features specialized horizontal ribbing

Winona Ribbed Fiberglass Planter – Modern Architectural Large Outdoor / Indoor Tall and Wide Span Block – Skinny (Narrow Depth) 

Elevate Your Space with Architectural Texture

  • Fiberglass Material: Professional-grade construction provides extreme durability with a high-end, substantial feel—engineered to be lightweight for easy installation yet heavy-duty for permanent use.

  • Structural Integrity: This long span planter features specialized horizontal ribbing that acts as a natural exoskeleton, ensuring perfectly straight walls and eliminating the need for internal steel.

  • Modern Architectural Finish: Hand-finished in a UV-resistant Matte Slate Gray (Dark Gray) for a sophisticated, stone-like aesthetic that resists fading and cracking in all environments.

  • Skinny (Narrow Depth) Design: The 12" width is specifically optimized for tight spatial perimeters, walkways, and balcony edges where maintaining a slim footprint is essential.

  • Outdoor / Indoor Performance: Completely frost-proof, shatterproof, and fade-resistant; this span block is designed for 24/7 exposure in extreme heat or sub-zero climates, yet refined enough for luxury interiors.

  • Smart Functionality: Equipped with pre-drilled drainage holes and removable rubber plugs for effortless moisture control in both commercial lobbies and private terraces.

  • Free Fast Shipping – All Orders.

  • Dimensions: 30"L x 12"W x 17"H


The Designer's Perspective: Why Ribbed Texture Matters

The Winona is a strategic tool for creating visual rhythm. While smooth-walled planters lean toward a silent minimalism, the Winona’s ribbed texture introduces "architectural shadowing." Designers utilize this texture to break up the visual monotony of long corridors or large glass walls, providing a tactile contrast that softens industrial materials like concrete and steel.

At 17 inches tall, this is a tall and wide trough with a commanding presence that effectively defines boundaries. The horizontal ribs draw the eye along the length of the long span planter, making narrow spaces feel more expansive and grounded. Additionally, the Matte Slate finish is a hospitality favorite because the texture naturally disguises fingerprints and water spots better than smooth-surfaced alternatives.

The Science of Structural Geometry

While traditional long planters often require internal steel reinforcement to prevent "bellying" (the outward bulging of the walls), the Winona utilizes corrugated structural engineering. Much like the ridges in architectural steel siding or a shipping container, the "peaks and valleys" of the ribbed walls significantly increase the material’s structural rigidity.

This geometry allows the fiberglass to resist the outward pressure of heavy, wet soil and root expansion naturally. By eliminating internal steel, the Winona remains more maneuverable than reinforced models while maintaining a crisp, architectural silhouette that stays perfectly plumb over time.


Versatile Settings for the Winona Span Block

  • Residential Balconies: The skinny (narrow depth) footprint fits perfectly against railings, providing a lush green curtain without blocking walkways.

  • Restaurant & Cafe Dividers: Create a "living wall" to separate seating areas from traffic with a durable, textured barrier.

  • Office Foyer & Building Entries: Use this long block to frame doorways or guide guests through large, open environments.

  • Rooftop Decks: Lightweight for weight-sensitive structures but engineered for high-wind stability when properly ballasted.

  • Poolside Perimeters: The Slate Gray finish and ribbed texture hide water spots and maintain a premium, spa-like feel.


Verified Plant Pairings (Optimized for 12" Width / Depth x 17" Height)

The 17" vertical depth supports healthy root systems, while the skinny 12" width is best suited for plants with an upright or cascading growth habit.

For Privacy and Structural Lines:

  • Snake Plants: A designer staple; the vertical, sword-like leaves provide a sharp, clean contrast to the planter's horizontal ribs.

  • Horsetail Reed: This architectural plant grows straight up and thrives in the deep, contained soil of the Winona.

  • Sky Pencil Holly: A columnar shrub that stays narrow. The 17" vertical depth is perfect for its root system, allowing for vertical privacy.

For Color and Cascading "Spiller" Effects:

  • Silver Falls: A cascading plant with shallow roots that creates a shimmering silver "waterfall" over the dark gray finish.

  • Sweet Potato Vine: Offers vibrant lime-green or dark purple foliage that drapes elegantly over the ribbed edges.

  • Geraniums: Classic flowering plants that thrive in the 17" soil capacity and provide consistent seasonal color.


Pro-Tips for 2026: Stability Meets Drainage

  • High-Wind Stability (The Hybrid Method): For exposed rooftop or coastal placements, add 2–3 inches of heavy river rock to the base. Important: Place a layer of landscape fabric over the rocks before adding soil. This adds necessary weight to prevent tipping in high winds without creating a "perched water table" that causes root rot.

  • Maximize Drainage: Modern horticultural science recommends avoiding the old practice of a loose "gravel layer" without a barrier. For best results, use high-quality potting soil throughout the planter to ensure consistent moisture wicking.

  • Planter Risers: For optimal drainage, use slim planter feet to lift the trough 1/2 inch off the ground. This breaks the surface tension between the planter and the floor, allowing gravity to effectively pull excess water away from the root system.

The Winona Rectangle Planter is made in India by NMN Designs®

Save Extra 10% OFF Entire Order ($125 Minimum) with Code GET10

Enjoy always free, fast shipping. Typically within 2-3 business days.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 25751053939

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Eric Caldeira
Houston, US
★★★★★ 5
I wish I had Siless 20 years ago!!!
Model: SLH20025, Model: SLH20025
I have installed all kinds of insulation in vehicles over many years. I only needed to purchase 2 boxes to complete the entire interior siding of my 2025 chevy express, what a great value! I wanted to insulate my locksmith van for sound and heat. The sound reduction virtually eliminated the road noise. These panels also look amazing. It got up to 110F in the sun with the doors closed. After adding Siless insulation the temperature maxed out at 97F. That is a massive difference. Plus, I didn't even finish with the roof before testing. Siless Hybrid 3in1 was extremely easy to cut and adhere onto metal panels. I'm impressed with the quality of the individual panels and the adhesive is not toxic smelling compared to some others. My favorite thing about these panels is you can actually take them off and readjust them before they finally stick and they do not leave any black residue behind when you pull them up to adjust them. All I needed was a heat gun, knife and a roller to complete this job. The size of each panel is perfect, you can handle them with ease. I probably won't need your product again for a while, but when I do I will definitely be back.
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Reviewed in the United States on September 21, 2025
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Mark Kadrich
Grantham, US
★★★★★ 5
Works well and is easy to install.
Model: SLH20025, Model: SLH20025
I was sound and heat insulating a generator bay in my class A RV so I did three tests before and during material application: I did a sound level test to see how effective the material was for my application, a "stickiness" test, and a flammability test. This was indoors on a dry 78°F day. From beginning to end, the entire process, including testing, took 5 hours to install 25 sqft or material in a very complex area. One hour for cleaning, 3 hours for installation, and 1 hour for test setup and testing. Using a sound meter, I took before and after readings and determined that I reduced the sound level by 2.2 db (40% energy decrease) with a noticeable decrease in sound and frequency. The generator bay is located under the master bedroom in the aft portion of the coach. The sound went from a rattling, vibrating generator noise to a more tolerable low level rumble. The material was easy to apply. I did some testing prior to application and determined that surface preparation is key. I cleaned my painted metal surface and then degreased with acetone and the material stuck well. Be careful and purposeful when you apply the material because once it was stuck to the metal, it was quite difficult to remove or reposition. Since it was going to be installed into a gasoline powered generator bay located under our sleeping quarters, I did some flame testing to determine the level of risk. Although not highly flammable after installation, my testing revealed that the PE used will catch on fire under certain circumstances. In order to reduce the risk, I used aluminized duct tape to ensure that all the edges were sealed and the PE was not exposed to direct flame in the event of a fire. I also decided to install an automatic fire extinguisher as an added precaution. In all fairness there should be one installed in the generator bay anyway. All in all, I am very satisfied with the product and the results. I have recommended this product to my other RV owner friends.
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Reviewed in the United States on April 13, 2025
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Josh
San Leandro, US
★★★★★ 5
Great product. Best value i could find
Model: SLH20025
I'm using talk to text, so forgive any grammatical and spelling errors. I ordered this product after doing a bit of research on sound dampening materials. I had been doing car stereo for quite some time since my teens. Itook a break for 20 years or so. I'm now 40 and back in the day there was dynamat. And that was about it. as irecently bought a new 2017 F350 crew cab. I wanted to put in a new stereo system and being that it was my dream truck. I was going to put in my dream stereo. But before I could do that, I needed to start with the sound deadening. I looked into today's leading product and found a company called resonx. Had taken their place as king of the hill in sound deadly. I researched their products and found the materials they were built from and Silas was the closest match at the best price I used Silas Max. First, then Silas 3 and 1 hybrid over that on all exterior panels. Then, on the interior panels. I used the 3 and 1 hybrid . on the floor I used Silas Max. Then, the 3 and 1 hybrid, then Silas liner over that the car is incredibly quiet . As far as sound dampening and deadening, it works very well for the money really can't beat it. Do your homework no How and where to apply it? And you really can't go wrong or about $400. I did. What would have cost me easily? Two thousand in other brands highly recommend the product prep work.Is everything do your homework?Do it right and you will be happy with this stuff
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Reviewed in the United States on May 6, 2026
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william scott
Los Angeles, US
★★★★★ 4
Not simple, nor easy
Model: SLH20025
I wanted to add sound proof material to the bare metal areas on the floor of my Toyota Tundra. The area behind the front seats had a haphazard application of sound deadening material. There were several complications to the project which may come up in other vehicles. First is the floor covering which had plastic pillars underneath to support any weight on the cover. The sound deadening material had to be cut out so these pillars would rest on the bare metal of the floor. This required a lot of cutting with a utility knife and at times heavy scissors. The instructions say to make a template before cutting the material and I did this for the driver's side. This doubled the amount of time needed to install it. On the passenger's side I laid the rectangles of material with the backing on and pressed the floor covering onto the material. This showed where the support pillars were, which I then cut out. Second is peeling the backing off the material. This can be very difficult as the adhesive sticks to it. The backing came off in multiple pieces and sometimes took 5 minutes for one piece. They say to wear gloves when handling the material but this is impossible when trying to get the backing off. Third is pressing the material onto the metal. The instructions say to use a roller, but this was impossible for the irregular surface I was working on. The hand is the best tool to press the material on. The material seems to be of high quality and I expect it will reduce the road noise in the cab.
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Reviewed in the United States on May 18, 2025
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Verified Purchase
Dan K.
Alexandria, US
★★★★★ 5
Bringing a 1976 MG Midget to the modern world!
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
I've been restoring a 1976 MG Midget barn find. I bought some Sinless liner to help make the car rattle less and feel more solid. This product is easy to cut, easy to install, and extremely sticky. I used it to line the trunk, the interior, and even some under the hood of the old MG. The adhesive stands up to the brutal temperature of the engine bay, and when (by accident) some fuel spilled onto the foam, it didn't fall apart or turn to mush. Thanks to Siless, the MG now feels like a modern car. The floor pans feel much more solid, the doors make a heftier thud when you close them, and the trunk no longer sounds like a percussion instrument when you touch it. If you know what you're doing, this product will transform the feel of a car. I found that 36 sq ft was enough for my MG Midget, but for a bigger car I would want more. The pattern on the back helped me to cut perfectly measured squares and rectangles. The foam itself doesn't have a strong odor, it works super well, and has held up to several months of changing temperatures (in the Midwest US.)
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Reviewed in the United States on November 11, 2025

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