The 5 Best Greenhouses of 2020

Garden year-round with these smart sheds

Our editors independently research, test, and recommend the best products; you can learn more about our review process here. We may receive commissions on purchases made from our chosen links.

Our Top Picks

Best Mini: PlantHouse Mini Greenhouse at Wayfair

"It’s a great choice for placing anywhere that space is at a premium."

Best Budget: Flower House PlantHouse 3 Pop-Up Plant House at Amazon

"The PlantHouse is made of waterproof material and has several poles that add to the stability of the structure."

Best Cedar: Outdoor Living Today’s Cedar Greenhouse Kit at Amazon

"Outdoor Living Today’s Cedar Greenhouse Kit is a popular choice for a cedar greenhouse."

Best Lean-to: Palram Sun Room 2 at Bed Bath & Beyond

"This lean-to greenhouse is constructed with air circulation and UV protection in mind."

Best Cold Frame: GardenStarter Cold-Frame Greenhouse at Wayfair

"A great choice if you’re looking to extend your growing season or harden-off new plants."

Best Mini: PlantHouse 2 Ft. W x 2 Ft. D Mini Greenhouse

mini-greenhouse

Courtesy of Wayfair

At just 2 x 2-feet, this greenhouse has a small footprint that's a great choice when space is at a premium. This small greenhouse resembles a tent and can be set up on both soil or hard surfaces. The large door makes it easy to go in and out but keeps unwanted pests out. Because of its small footprint, it can be transported and set-up in a matter of minutes.

Reviewers give this product high marks for its durability, size, and ease of use. If you've never owned a greenhouse before, this is a great option for beginners that can be used to grow herbs, vegetables, and more. Customers also report that the Gro-Tec polyethylene material does a terrific job of holding in heat and providing the proper amount of ventilation.

Best Budget: Flower House PlantHouse 3 Pop-Up Plant House

This portable greenhouse is easily assembled in a matter of minutes and comes in a few different sizes depending on your needs. The PlantHouse is 3.5 x 3 x 3-inches so it can easily be positioned over existing shrubs, or place your containers inside of the greenhouse to protect from cooler temperatures. Another nice feature that sets this budget greenhouse apart is the fact that its vents are screened—keeping your tender plants from becoming an easy snack for birds or insects.

The PlantHouse is made of waterproof material and has several poles that add to the stability of the structure (similar to the construction of a pop-up tent). People love it for its ability to trap heat, and it also is useful in protecting vegetation from being eaten by deer and rabbits. For the price, this budget greenhouse is a great choice if you need to protect just a few plants or shrubs.

Best Cedar: Outdoor Living Today’s Cedar Greenhouse Kit

Outdoor Living Today Cedar 8 ft. x 12 ft. Greenhouse Kit
Courtesy of Home Depot

Cedar is known for its excellent durability and resistance to insects and pests, so a greenhouse made from cedar would be a natural choice. Outdoor Living Today’s Cedar Greenhouse Kit is a popular choice for a cedar greenhouse.

This greenhouse measures 8 x 12-feet and will be both a functional and aesthetically-pleasing addition to your green space. The cedar greenhouse will require you to assemble the parts and pieces before diving into your horticulture, but users report that the pieces were all numbered and that assembly was relatively easy. A few people commented on some boards being rough or split, but overall, the assembly process wasn’t a big concern.

One of the great features about this greenhouse is that the vents open automatically depending on temperature—so you won’t need to run outside to manually open or close the vents every time the temperature fluctuates. This Cedar Greenhouse Kit is pricey—and costs significantly more than many other styles of greenhouses. However, the beautiful and practical cedar finish is a great choice for gardeners that are serious about having a year-round space to protect and nurture their plants.

Best Lean-to: Palram Sun Room 2

palram-greenhouse

Courtesy of Bed Bath and Beyond

As their name implies, lean-to greenhouses are a great, low commitment way to add more space to your setup. Rather than standing alone, they instead “lean” close to an existing structure—allowing for both easier access to your plants and the option to use the space as a sunroom or seating area. 

This model from Palram is constructed with air circulation and UV protection in mind: a hinged door and roof vent allow for air to circulate easily, while roof panels diffuse light to protect from UV rays. Its white resin frame has a lower profile than black or gray frames, making it a seamless addition to your outdoor space (one reviewer notes that it looks like it was built onto her house). Assembly might prove difficult—it might be worth hiring additional help—but it will stand super sturdy once put together.

Best Cold Frame: GardenStarter 4 Ft. W x 2 Ft. D Cold-Frame Greenhouse

cold-frame-greenhouse

Courtesy of Wayfair

The GardenStarter Cold Frame Greenhouse is a great choice if you’re looking to extend your growing season or harden-off new plants.

The natural cedar frame is sturdy and users report that assembly was simple and took only a matter of minutes. The polycarbonate windows can be opened for ventilation, watering, or pruning and have a locking mechanism to keep them in position.

The cold frame greenhouse can be anchored down, or keep it portable and position it over plants as your gardening needs change. It measures
16 x 48 x 24-inches and provides eight square feet of growing, so use just one for a small set of plants or purchase several to protect larger groups.

Continue to 5 of 5 below.