Sungrow 20

Sungrow 20

Approx Size: 10' × 19.5' × 8'

Picture the tree fort from your childhood hidden in your own backyard. A vibrant garden filled with lush greenery and new life. A cocoon where plants soar indoors regardless of the weather outdoors.

Explore your creative side with a Planta Sungrow Greenhouse.


One of the strongest greenhouses in the world: heavy-duty materials, more weather-resistant, and with a decade-long warranty.

  • New door window handles and metal trims.
  • Comes with two doors (one at each end).
  • Wind resistant up to 65 mph for those living in gusty climates.
  • Withstands a snow load (light snow) of up to 6 feet (75 psf), and 3 feet of packed snow making it perfect for areas with harsh winters.
  • Made with a heavy-duty galvanized steel frame and 6 mm double-wall polycarbonate panels.
  • Bell-shaped design - the wind, snow, and hail just slide off the sides.
  • Extendable beyond 100ft - so you can expand your greenhouse when you're ready.
  • Maintenance-free means more time to focus on your garden.
  • 10-year warranty because our greenhouse is undeniably durable.
  • Access to our private Facebook group to connect with and learn from other greenhouse owners.
Backorder now - will be available September 2023.
Regular price $3,650 USD
Regular price $3,800 USD Save $150 Sale Sale price $3,650 USD
Sold out
Have questions? Call us 1-877-669-1286
View full details

About Sungrow 20

The Planta Sungrow 20 was designed with the backyard farmer in mind. The quality materials allow for 3 or 4 season gardening of beautiful flowers, delicious fruits, and vegetables in most areas. Not to mention, the attractive and sleek design adds a stunning element to your backyard.


Exact size: 118.1 x 94.5 x 238.56 inches

The reliable rust-resistant steel frame is strong enough to withstand the most extreme climates, regardless of where you may live. So feel confident knowing that your garden will continue to thrive in a safe and solid environment that will stay standing for years to come.

Snow Load Up To 75 psf (360 kg / m²)
75 psf (360 kg / m²) is equal to 6 feet fresh snow layer or 3 feet packed snow layer and is maintenance free in the winter the winter
Wind Resistant up to 65 mph (100 km/h)
Sturdy greenhouse construction that resists winds up to 65 mph (100 km/h)
Extendable & Customizable
This greenhouse can be extended with additional expansion kits
Have questions about this product?
Ask a Question


Rated 4.9 out of 5 stars
Based on 80 reviews
Total 5 star reviews: 73 Total 4 star reviews: 4 Total 3 star reviews: 3 Total 2 star reviews: 0 Total 1 star reviews: 0
96%would recommend this product
Customer-uploaded media carousel. Press left and right arrows to navigate. Press space or enter to open more details.
Slide 1 selected
QualityRated 4.8 on a scale of 1 to 5
DurabilityRated 4.6 on a scale of 1 to 5
Wind and Snow ResistanceRated 4.2 on a scale of 1 to 5
InsulationRated 3.7 on a scale of 1 to 5
InstallationRated 3.1 on a scale of 1 to 5
Customer ServiceRated 4.5 on a scale of 1 to 5
80 reviews
  • PK
    Patti K.
    Verified Buyer
    I recommend this product
    Location Wisconsin
    Rated 5 out of 5 stars
    1 week ago
    Quality greenhouse

    We definitely chose the Planta Sungrow 20 for its strength. We get a lot of snow in northern WI and that was a concern. We can see by the design, how snow will not accumulate. We have only had our greenhouse 5 months and are loving it! Looking forward to supplying friends and family with fresh tomatoes and broccoli in Oct/Nov! Lots of relaxation and contemplation in this space :)

    PG Profile picture for Planta Greenhouses
    Planta Greenhouses
    7 hours ago

    Thanks for your wonderful review! 🌟

    We're thrilled to hear that you chose the Planta for its strength, especially considering the snowy conditions in northern WI. It's great that you've been enjoying your greenhouse for the past 5 months, and we can't wait to see those fresh tomatoes and broccoli in Oct/Nov! 😊 Your pictures look fantastic too! 📸🌱🍅

  • LB
    Linda B.
    Verified Buyer
    I recommend this product
    Location New Mexico
    Rated 5 out of 5 stars
    1 week ago
    Love my greenhouse

    I love it.

    PG Profile picture for Planta Greenhouses
    Planta Greenhouses
    7 hours ago

    Thank you for sharing your love for your greenhouse which looks fantastic in those pics! 😍 📸🌿🌼

  • DF
    Dave F.
    Verified Buyer
    I recommend this product
    Rated 4 out of 5 stars
    3 weeks ago
    Works great!

    Well it took a while to put together, but it seems to be working very well! One thing, some of the bolt heads are rusting already, and seem to be of poorer quality than the rest. And regarding this survey, I have not had it over a season to be able to judge Durability, Insulation , or snow resistance, so I hit the middle ground!

    PG Profile picture for Planta Greenhouses
    Planta Greenhouses
    3 weeks ago

    Your photos of the greenhouse look fantastic! We appreciate your review.

  • SD
    Stephan D.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    Super !!

    Take a lot of time and patience to built but the result is awesome 👍

    PG Profile picture for Planta Greenhouses
    Planta Greenhouses
    1 month ago

    Thanks for sharing your experience, your greenhouse looks fantastic!

    Happy gardening :)

  • MM
    Mike M.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    Mike’s Greenhouse

    Beside the fact that it took a long time to assemble due to missing holes in the metal channels that I had to eventually drill out myself, I think it’s a pretty awesome greenhouse. Very sturdy and looks great too!

    PG Profile picture for Planta Greenhouses
    Planta Greenhouses
    1 month ago

    Hi Mike, thanks for your valuable feedback and those fantastic pictures!

    We apologize for the inconvenience during assembly. Happy planting :)

Reviews LoadedReviews Added


Sungrow 20 ships in these boxes:

  L, (in) W, (in) H, (in) Weight,(lbs) Quantity
Planta Base 1 62 11 3 46 1
Planta Base 2 50 15 3 73 1
Planta Base 3 40 5 3 44 1
Planta Polycarbonate base 83 44 3 40 1
Planta Extension 62 11 3 79 2
Planta Polycarbonate Extension 83 44 2 20 2

Planta Greenhouses is dedicated to deliver your order promptly, so you can begin using your greenhouse products right away.

Because greenhouses are packaged in large boxes, they have unique shipping requirements, including: 

  • We will contact you to confirm shipping price, based on your location and order size.
  • Shipping on most orders is between $250 and $450. Deliveries to remote areas may cost extra.
  • When you place your order, please make sure to enter the correct Phone and Address at checkout. You will be contacted by phone before the item is shipped. We cannot be responsible for deliveries to incorrect addresses.
  • As part of the delivery process, we require a contactable telephone number (for the courier company to contact you) before the item is shipped.
  • We will make every effort to ship your order in the fastest possible manner, and by the mode of transportation that you specify; however, in the event of no specific instructions, we will use our judgment and ship the best, fastest and most economical way. We are not responsible for delayed delivery due to conditions beyond our control.
  • We do not ship to PO Boxes, as in most cases you will need to sign for your item. 
  • White glove delivery service isn't available. The greenhouse components are delivered in multiple boxes, the largest of which weighs 80lbs. The greenhouse will be delivered to your driveway. Please make arrangements to have the package moved to its installation location. 
  • Orders placed on weekends and public holidays will be processed the next business day.


Residential Greenhouses

How is the greenhouse anchored to the ground?

Every greenhouse kit comes with optional legs that can be dug directly into the ground. The amount of legs included depends on the greenhouse size.

Are there doors on both ends of the greenhouse?

Yes! All of our Sungrow models come with manual doors and a manual window above the door on both ends of the greenhouse.

What is the width of the door opening?

For our Sungrow models, the door opening width is 800mm or 31.5".

What type of base/foundation is the best for me?

There are several different types of greenhouse bases, information, and pictures posted by our customers on our Customer Stories page and our Planta Facebook page. Additionally, you can learn more about "Types of Greenhouse Bases - With Pros & Cons of Each" on our blog.

Do you have lean-to greenhouses?

Unfortunately, we do not have any lean-to greenhouses available at this time.

Do you make custom size greenhouses?

All of our products come pre-packaged by the manufacturer and can only be customized in length (6.5' extension). However, the height of the greenhouse can also be increased if placed on a base (up to 5ft above the ground)

What polycarbonate panels are used for residential greenhouses?

We use 6mm heavy-duty, double-walled polycarbonate panels with a UV-protected outside layer for our Residential Greenhouses.

What is the frame made of?

The greenhouse frame is made out of heavy-duty galvanized steel.

Roof Ventilation Windows

How many roof ventilation windows are recommended for the greenhouse?

It is strongly recommended to go with an even amount of roof ventilation windows. This is so you can place at least one on either side of the greenhouse. The amount of windows required depends on the greenhouse size, the climate you are in, and the types of plants that will be grown inside the greenhouse.

How do the Automatic Ventilation Windows work?

Our Automatic Ventilation Windows do not require any batteries or electricity. A heat-activated mechanism will open/close the window once a certain temperature is reached.

What are the opening and maximum opening temperatures for the Automatic Windows?

The opening temperature is between 17 °C and 25°C (62.6°F to 77°F), while the maximum opening is at 30 °C (86°F).

Can I add windows for my greenhouse later?

Roof ventilation windows work as an add-on and can be installed only once the greenhouse installation is complete. Windows can be added later as well.

Sungrow Greenhouses

What is the snow load on the Sungrow models?

The Sungrow models can hold snow load weight of up to 6ft of fresh snow (75 psf or 360 kg / m2) on top of the greenhouse.

What is the wind resistance on the Sungrow models?

The wind resistance is 100km/h (65 mp/h).

Post Purchase

Is the greenhouse easy to install?

On our YouTube channel, you'll find step-by-step installation guide videos to help ease the installation process.

Is there support post-purchase?

Of course! Our after-sales customer service team is available to answer any and every question. You can fill out our contact form or give us a call at 1 (877) 669-1286.

Customization Options

Can I add my own vents, fans, heaters, and lights?

Absolutely! The polycarbonate is very easy to work with, and the galvanized steel frame is strong enough to support any additional accessories.

Can I get a longer greenhouse?

Our greenhouses are extendable up to 100ft. Learn more about our extension kits for both the Sungrow and Sigma models.