UPMCT Plastic Patio Window Box, 3-Pack

Last updated: September 20, 2023

UPMCT Plastic Patio Window Box, 3-Pack

Our Review Process

Don't Waste Your Money is focused on helping you make the best purchasing decision. Our team of experts spends hundreds of hours analyzing, testing, and researching products so you don't have to. Learn more.

Don't Waste Your Money Seal of Approval
Look for the DWYM seal for products that are the best in the category.
Show Contents

We looked at the top Window Boxes and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Window Box you should buy.

Overall Take

Whether you're looking to display your flowers or herbs indoors or outdoors, this window box set is an excellent choice. The set includes rectangular boxes that are constructed from environmentally friendly materials. Since the boxes widely compatible, you can use them in a windowsill, on a patio or on a shelf in your office.

In our analysis of 9 expert reviews, the UPMCT Plastic Patio Window Box, 3-Pack placed 1st when we looked at the top 14 products in the category. For the full ranking, see below.

From The Manufacturer

Material: Polypropylene, Plastic, Shape: Rectangular Item Weight: 8.7 Oz, Mounting Type: Floor Standing. Durable material: The window planter is made of premium plastic, durable and environmentally friendly, with high quality plastic, our window boxes are avoid to breakage caused by sunshine. They will not chip, crack or discolor. So you can reuse the planter for several seasons. What you get: 3 pcs window planters, which can give you the versatility to add beauty to any space, that add decorative detail and curb appeal and provide a secure place for plants to grow. You can create a container garden anywhere. They are the right choice to plant flowers, vegetables, strawberries, miniature roses, tulip, carnation or herbs and so on. Widely used: Window boxes planters are great for gardening in small spaces, such as windowsill, patio, your office, living room, or kitchen etc, plants improve physical and mental health, help clean the air and add beauty anywhere they live, can be used to plant items that need more root space, and to allow flowers and plants to be grown in multiple rows. Unique design: Designed with raised pot feet, the bottom many reserved drainage holes, includes a detachable drainage tray, drainage tray has holes at the bottom which matches those of the boxes to drain out excess water. Plastic drainage tray can keep your planter dry no matter how many times you water the plants, promoting your plants growth.

Expert Reviews

What experts liked

What experts didn't like

Our Expert Consultant

Vicki Liston 
Home Improvement Expert

Vicki Liston writes, produces, and narrates “On The Fly…DIY,” an award-winning home improvement and DIY show of unique project tutorials for the casual DIY’er.

Home improvement and all things DIY have been Liston’s passion since she bought her first house in 2007 and she started making video blogs in 2014. She’s performed hundreds of DIY projects, from small ones to major, wall-smashing renovations and can teach you how to make a trendy DIY barn door for cheap. The proceeds earned from “On The Fly…DIY” are donated to no-kill animal shelters and rescue organizations.


Window boxes can be a simple addition to your home that will help add color and character to the property by framing flowers and other plants directly in front of your windows for everyone to see as they pass by and for you to see as you look out from the inside.

Often being constructed in varying materials, window boxes will be exposed to outdoor weather events and high levels of sunlight, depending on the direction they face, so choosing the right material is something you want to think about.

“Shop for a window box that is weather-resistant and UV-resistant,” says Vicki Lison, producer and narrator of “On The Fly…DIY,” an award-winning home improvement and DIY show of unique project tutorials for the casual DIY’er. “Fiberglass, vinyl and plastic all have models that boast these features.  Fiberglass is the most expensive of the three but it is also the longest lasting and rot-proof.”

Metal is a very durable material and often considered for the construction of window boxes. The things to think about when going with a metal model are that they can dent if made from thin sheet metal and they can rust in certain conditions over time, eventually rotting out. But metal can be a stunning and durable material when constructed properly.

“Metal box style versions should be used only on windows that do not receive full sun all day as they can get extremely hot in temperature,” says Liston.

Wood can be a popular choice for a window box due to its natural look. Wood boxes should be inspected regularly to see if any water damage or bug damage has been done. The pretty aesthetic of the wooden window box comes at a cost of higher weight when compared to plastic or fiberglass models, and that can impact how much soil you can put in it before reaching the maximum of how much weight can be supported by the window or hardware that attaches it to the building.

“If your outer window sill is not wide enough to safely support a window box, ensure it comes with mounting hardware. You may need to consult a professional during the installation process as brick, siding, stucco and natural stone all have different drilling requirements,” says Liston. “You’ll also want to ensure the holes drilled are properly sealed from weather and pest infestation. Window boxes with a railing mount feature are easier to install as they take advantage of existing railings, decks, balconies and banisters to support the window box’s weight.”

Buying Advice

  • If you choose wooden window boxes, coat them each year with a sealant that will help protect them from water and bug damage.
  • If you like the convenience of not having to constantly water your plants, or even if you are the forgetful gardener who can’t quite remember the last time they did water their plants, seek out a window box with a self-watering reservoir that rarely needs to be filled up as it slowly feeds the appropriate amount of water to the plants in the box.