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Depending the brand and order value, the special discount can save you from $20 to $600. The most beautiful part is the discount is applied ton the top of any discount we already or will give to you.

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No more call after purchasing for extra shipping cost with specific products. We promise customers to get free shipping with all greenhouses that purchase from our store.

*For Planta Customer: Up to $150 Discount Avaliable if pick up from terminal warehouse. Chat with us.

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Sigma 20™ 10x7x20.ft Greenhouse Kit
Sigma 20™ 10x7x20.ft Greenhouse Kit
Sigma 20™ 10x7x20.ft Greenhouse Kit
Sigma 20™ 10x7x20.ft Greenhouse Kit
Sigma 20™ 10x7x20.ft Greenhouse Kit
Sigma 20™ 10x7x20.ft Greenhouse Kit
Sigma 20™ 10x7x20.ft Greenhouse Kit
Sigma 20™ 10x7x20.ft Greenhouse Kit
Sigma 20™ 10x7x20.ft Greenhouse Kit

Sigma 20™ 10x7x20.ft Greenhouse Kit

Vendor
Planta
Sale price
$2,799.99
Regular price
$3,175.00 You save 12%
Unit price
per 

Availability:

Estimated Arrival: Between Aug 24 and Aug 31.


Sigma 20 Greenhouse is a compact heavy-duty Round Style garden greenhouse designed for backyard farming in limited spaces, made of steel and polycarbonate for 3 or 4 season gardening of flowers, fruits, and vegitables, especially for winter. 

The unique 7 ft roof height makes it very comfortable to work inside. The heavy-duty, rust and snow-resistant galvanized pipe frame provides assurance that your garden will remain safe during extreme winter conditions and will need to be assembled only once.

This greenhouse comes with «splitter» doors on both sides, two manual windows, and the option to install multiple automated windows. We suggest customers add 2 extra windows for maximum performance. 

As the No.1 distributor of Planta Greenhouse, we work closely with the brand to give you a no-hassle experience from order to delivery. You will get intent notifications of orders, no shipping cost of the greenhouse, and personal customer service.

Sigma Highlight

FEATURE

  • Exact size: 118.1 x 83.9 x 236.2 inches ( For Foundation Measurement)
  • Size: 10.ft × 19.5.ft × 7.ft
  • Galvanized Steel Structure
  • Heavy-Duty, Rust-Resistant Frame
  • Snow Load Weight of 32psf
  • 6mm Twin-Wall Polycarbonate Panels
  • Extendable and Customizable
  • Can Be Installed with or without a base
  • Garden Beds are not included 

MANUAL & GUIDES

OTHER SIZE

    SPEC

    schematic Sigma 20
    FRAME MATERIAL Galvanized Steel
    R-VALUE 1.54
    U-VALUE 0.65
    LIGHT TRANSMISSION 80%
    ASSEMBLY REQUIRED (Y/N) Yes
    WATERPROOF (Y/N) Yes
    WATER-RESISTANT (Y/N) Yes
    PRODUCT FABRIC 6mm Polycarbonate
    R-VALUE 1.54
    U-VALUE 0.65
    STEEL GAUGE  1mm
    ROOF VENT 0
    END VENT 2
    SIDE VENT 0
    # OF PEOPLE FOR ASSEMBLY 2
    ASSEMBLY TIME  Full Weekend
    SHIPPING METHOD LTL
    SHIPPING LENGTH 10'
    SHIPPING WIDTH 19.5'
    SHIPPING HEIGHT 7'
    WEIGHT AS SHIPPED 410 lbs
    SHIP BOX

    1 Pallet includes 6 Boxes

    80" x 41" x 2".       82 lbs

    76" x 20" x 2".      68lbs

    83" x 44" x 3"      40 lbs

    77" x 17" x 3".     79 lbs

    83" x 44" x 2".     20 lbs (Qty:2)

    Skid:                       100Lb

    DOOR SIZE (in) 35 (W)X 60 (H)
    ASSEMBLED EXTERIOR DIMENSIONS DEPTH (FT) 20
    ASSEMBLED EXTERIOR DIMENSIONS HEIGHT (FT) 7
    ASSEMBLED EXTERIOR DIMENSIONS WIDTH (FT) 10
    TOTAL STORAGE VOLUME (CU. FT.) N/A
    TOTAL STORAGE AREA (SQ/FT) 220
      • What difference between Sigma and other Planta models?

      • Are you authorized to sell Planta Greenhouse?

      We are No.1 reseller of Planta Brand Greenhouse and customer will get 100% same product and full coverage of warranty. You can email info@plantagreenhouses.com to verify our dealership. 

      • How many ventilation windows do I need?

      We always suggest customer add 2 windows to Sigma greenhouse. If you live in southern area and purchase Sigma 26 and Sigma 32, 4 windows are suggested for the best cooling performance during summer.

      • What is the lead time?

      Begin on March 15th, customer can expect on receving greenhouse around 3 weeks after placing order.

      • Can I extend Sigma?

      Yes. The Sungrow can be extended up to 100ft. Shop Extention Kits here

      • What is the door opening width?

      The exact doorway opening width is 800mm. (31.5 Inches)

      • Do I need base for this greenhouse?

      Base is optional not required. It can be set up on the ground, concrete and larm. 

      • How is this greenhouse anchored to the ground?

      Sigma greenhouse kit comes with optional legs can be dug directly into the ground.

      • Would panel handle a flying tree branch? 

      There is no accurate answer for this question as the greenhouse only has a load rating for objects like resting snow on the roof of the greenhouse. 

      • What is warranty covered?

      Warranty only covers metal and polycarbonate damage from the load and corrosion due to the age. However, We will offer a discounted price for the replacement parts if it is damaged by tree branch and falling.

      • How can I claim warranty?

      Please contact us or Planta Greenhouse both to claim your full warranty.

      • How much does shipping cost?

      Free Pick from Westfield, MA warehouse. Shipping cost showing above with price.If you buy accessories with greenhouse together, there will be no extra charge. Contact us for more detail. Extra cost will charge for ship to customers address. Please add correct "Ship to" option to cart. 

      • How can you do sell cheaper than other planta dealer?

      As a small business, we do not have large operating expenses like the big brands. We do not charge more to cover our advertising budget. In addition, we have a good relationship with the manufacturer, they like us and we are able to get a high discount rate to help our customers save money.  

      • What method of shipping do you use?

      All Planta greenhouses will be shipped by LTL ground shipping.

      • Can I pay now and ship later? 

      Absolutely! You can pay in the front and request the date you want to ship out your order. As No.1 Planta dealer, we offer customers free storage service. 

      • Can I schedule my delivery? 

      Yes. Select "Appointment Delivery" option when checkout, the freight carrier will deliver to you the date you prefer. 

      • What is the lead time to process?

      It take 3 business days to process the order to ship. 

      • Is that hard to setup?

      Setting up a greenhouse is always a bit of a challange, We partner with Planta to offer greate USA base customer service. You can contact us when any issues appear, we are here to help.  

      • How do Automatic Ventilation Windows work?

      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.

      • Can I add windows to Sigma 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. But remember, buy windows later will trigger shipping cost. 

      • Still have questions? 

      Check our general FAQ page or chat with us. 

      SHOP PLANTA®


      Customer Reviews

      Based on 6 reviews
      83%
      (5)
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      17%
      (1)
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      L
      L.K.

      Directions were very difficult to follow.

      W
      W.C.
      Green house assembly instructions Where are they?

      Can't give you a review until I get the instructions and put it together.

      Hi Wayne: thank you for reviewing the product. The manual and installation video can find in this page above “ guide and info “ section which above the video.

      Thank you

      P
      P.K.
      Easy to assemble

      I’m 69 a woman and I’ve put the frame together by myself. It would have been easier with help but you can do it by yourself. They have good videos but they do need one for installing the automatic windows on the Sigma.

      Hi Peggy:

      Thank you for value review. We are working on more content regarding the assembly and will be adding them to the website as soon as available. You happy is our first priority. Cheers!

      D
      D.&.B.H.
      Sigma 20

      Packaged nicely received with no damage or missing parts. Looking at all the pieces and initially looking at the instructions was at first a little intimidating. However, it did ultimately go together quite well.
      The instructions could be better, adding more verbiage in some of the steps would help clear things up a bit.
      We haven't tackled the automatic window installations yet, however the finished Greenhouse is really nice. We look forward to many years of use.

      R
      R.
      It is beautiful

      The service in this store is perfect, I got greenhouse delivery a little bit late but Ronnie take care of everything for me. Happy shopping experience.

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