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.
Regular price $3,500 USD
Regular price $3,800 USD Save $300 Sale Sale price $3,500 USD
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Have questions? Call us 1-877-669-1286
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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 More About PSF
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
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Rated 4.9 out of 5 stars
Based on 88 reviews
Total 5 star reviews: 80 Total 4 star reviews: 4 Total 3 star reviews: 4 Total 2 star reviews: 0 Total 1 star reviews: 0
95%would recommend this product
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QualityRated 4.8 on a scale of 1 to 5
DurabilityRated 4.7 on a scale of 1 to 5
Wind and Snow ResistanceRated 4.5 on a scale of 1 to 5
InsulationRated 3.8 on a scale of 1 to 5
InstallationRated 3.2 on a scale of 1 to 5
Customer ServiceRated 4.7 on a scale of 1 to 5
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88 reviews
  • SF Profile picture for Scott F.
    Scott F.
    Verified Reviewer
    I recommend this product
    Rated 5 out of 5 stars
    4 days ago
    Good things come to those who "take their time"

    My wife had always wanted a real greenhouse, so once we moved to Nova Scotia we did our research and found that Planta, had some wonderful options to choose from. We spent hours looking at all the reviews on the Planta website. Even before we placed our order, we called Planta and asked a whole bunch of questions. Let me tell you, these guys are great, they were so helpful and always took the time to answer any questions we had. So we decided on the Sungrow 20, as it seemed like the greenhouse that would best suit our needs. From ordering to pick up, everything was there, intact and professional. Then we prepared to start the process.....this is where you will need to dedicate time,. This is not a fast build or at least for us it wasn't.....and overall I guess it took us about a month, from start to finish, but that was really just working on it during weekends. Overall, It was a great project that my wife and I feel very proud that we did it together, and didn't kill each other either !!! That said, from a construction standpoint....I would definitely recommend building the sections in a garage first, with all the boxes and parts laid out nicely. Then take the built arches to your base and assemble it there. I will say that referring to the assembly videos on the website are critical as often the manual didn't show the level of detail and it's easy to put something together incorrectly. So thank you Planta to having these videos as reference for your…

    PG Profile picture for Planta Greenhouses
    Planta Greenhouses

    Hi Scott & Stephanie,

    Thank you for sharing your wonderful experience! 🌟 We're delighted to hear that the Sungrow 20 has brought you and your wife such joy. Your detailed review and helpful tips will certainly benefit other customers. 😊

    The effort you put into building it together is truly commendable, and we're glad our support and assembly videos were useful. Your new tropical oasis in Nova Scotia sounds amazing! 🌿🏡

    Wishing you many years of happy growing!

  • TW Profile picture for Tanya W.
    Tanya W.
    Verified Reviewer
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    Sun grow 20

    We are currently just building ours. I wanted to mention the great customer service Gerry provided walking me through the purchase. It was appreciated greatly! Thank you Gerry!!

    Tanya Waters

    PG Profile picture for Planta Greenhouses
    Planta Greenhouses
    4 weeks ago

    Thank you for the shout-out! If you need any further assistance as you build, don't hesitate to reach out. Happy gardening!

  • SA
    Susan A.
    Verified Reviewer
    I recommend this product
    Location British Columbia
    Rated 5 out of 5 stars
    1 month ago
    Holds up to Canadian winters

    Love Love Love it , when I do t grow in it it’s my she shed. It holds up to cold and deep deep snow. Just remember keep the snow on the sides clean , you don’t want it to ice up and crack any poly.

    PG Profile picture for Planta Greenhouses
    Planta Greenhouses
    1 month ago

    Hey Susan,

    Thanks for your awesome review. We're glad you're loving it! 🌨️❄️

  • TK Profile picture for Tyler logo
    Tyler K.
    Verified Buyer
    Location North Carolina
    Rated 3 out of 5 stars
    4 months ago
    I give this 3 stars for some reasons

    It took a while to set everything up and the book instructions were very unhelpful. Thank god they have the video reference that helped a lot in conjunction with the book.

    Depending on what you plan to build inside also with any water or electrical and the foundations and if you want it waterproof that’s on you as well. You will end up spending well over the price for the greenhouse which is understandable. I’m not an engineer, but I feel like more thought and effort could have been out into the kit for installation ease and waterproofing.

    Rubber washers on the outside could be beneficial, should come with a tube of good quality silicon. Honestly I believe the automatic roof vent should just be thrown into this kit as a kind gesture.

    I would have been much more content with everything if it did.

    It’s not like I wouldn’t recommend this product but I would be honest to people about it.

    It’s should definitely be more clear that this is NOT waterproof and will leak tremendously on a heavy rains.

    I’ve taken many steps to decrease it and I think after useing some Zip tape along the horizontal brackets outside I might stop it for good.

    Customer service was good to every time I needed to call somebody answered so that’s a big plus

    Not a bad product but really think it could be better. And if I did buy another one I would need a sweeter deal with it lol

    PG Profile picture for Planta Greenhouses
    Planta Greenhouses
    4 months ago

    Hi Tyler,
    Thank you for sharing your feedback. We appreciate your honesty and will consider your suggestions for improvement. If you have further concerns or questions, feel free to reach out to

  • PK
    Patti K.
    Verified Buyer
    I recommend this product
    Location Wisconsin
    Rated 5 out of 5 stars
    8 months 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
    8 months 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! 📸🌱🍅

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

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.

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)

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.

What is the frame made of?

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

What is the width of the door opening?

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

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 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.

Roof Ventilation Windows

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.

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.

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.

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).

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).


Is there support after purchase?

Absolutely! Our after-sales customer service team is available to answer any questions and support you on your greenhouse journey. You can fill out our contact form or give us a call at 1 (877) 669-1286.

What resources are available to assist with greenhouse installation?

We offer several resources to help you with the installation process:

  1. Bilt App: Downloadable on the Apple Store and Google Play, it provides digitized step-by-step instructions.
  2. YouTube videos: A series of detailed video tutorials to guide you through the installation process.
  3. Printed Manual: Comes included with your greenhouse.
  4. Blog: Explore our blog for valuable insights such as "Expert Advice: 9 Tips For Installing Sungrow Greenhouses With Ease!"
  5. Customer-Only Facebook Group: Connect with other customers for valuable installation tips.

If you still need assistance, our customer service is ready to help via phone or email.

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

This can vary depending on your location, gardening plans, and desired aesthetic. To better understand the different options available, you can find several different types of greenhouse bases, information, and pictures posted by Planta Greenhouse owners on our Customer Stories page and our Planta Facebook page. Additionally, you can learn more about it on our Greenhouse Bases blog.

Customization Options

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

Of course! 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?

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

How can I customize my greenhouse?

The customization possibilities are truly endless with a Planta Greenhouse. To help you get started, take a look through “16 Ways to Supercharge Your Greenhouse” on our blog. 

Is hanging plants, heaters, and hammocks safe from my greenhouse frame? How much weight does it handle without affecting the guarantee?

It is safe to hang plants and accessories on a Sungrow greenhouse since each internal reinforcement arch can withstand up to 100 lbs/45.3 Kg. On the Sigma series, you can pre-drill the holes on the framing and hang small things. We would not suggest hanging anything heavier than 5 – 10 lbs / 2.2 – 4.5 Kg per arch.

May I heat my greenhouse with fire pits or similar?

You can use any heating source inside, like electricity, gas, propane, and even wood. It may be tricky to heat with wood, as you want to ensure that you keep the stove/pit away from the panels to prevent them from melting or burning if they are too close to the fire source. In this case, the customers ideally would want to come up with an exhaust system, making sure it’s not in contact with the panels, for being a flammable material.