Sigma Greenhouse Gen II

Spacious Backyard Kits, 10 ft Wide

4.7 · 90 reviews

Sigma 20 (Gen II)

Sigma Gen II greenhouse kits are arched backyard greenhouses rated for 32 psf of snow and 65 mph wind, with 6 mm twin-wall polycarbonate panels and a 5-year warranty. They're for sale in 4 sizes, all 10 ft wide, so you can choose the length that fits your space. Find your greenhouse.

Size: Sigma 20 (Gen II) · 10′ × 20′Size guide
$3,050$3,350Save $300

Free shippingTo nearest terminal
5-year warrantyFrame & panels
Pre-cut panelsFor easier installation
Guided assemblyVideos and live chat
Questions? Talk to a grower.

Mon–Fri 9am–5pm EST or Send a Message

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  • 32 psf snow load – Withstands a snow load of 160 kg/m², ideal for areas with moderate snowfall.
  • Wind resistant up to 65 mph for those living in gusty climates.
  • 5-year warranty because our greenhouse is heavy-duty and long-lasting.
  • Made with a heavy-duty galvanized pipe frame and 6 mm twin-wall polycarbonate panels.
  • Arched shape - so the wind, snow and hail just slide off the sides.
  • Comes with two doors (one at each end) and two manual windows.
  • Extendable beyond 100 ft - so you can expand your greenhouse when you're ready.
  • Maintenance-free means you have more time to focus on your garden.
  • Access to our private Facebook group to connect with and learn from other greenhouse owners.
  • The Sigma Greenhouse Gen II is available in 4 size configurations. Plus, you may purchase an extension kit, to extend the length of the greenhouse.
  • Extendable & Customizable
  • Snow Load Up To 32 psf 
  • Wind Resistant up to 65 mph
  • 5-year warranty because our greenhouse is heavy-duty and long-lasting.

Sigma 20 ships in these boxes:

  L, (in) W, (in) H, (in) Weight, (lbs) Quantity
Sigma Base 1 80 11 4 93 1
Sigma Base 2 78 24 3 93 1
Sigma Polycarbonate Base 82 44 4 58 1
Sigma Extension 78 21 3 63 1
Sigma Polycarbonate Extension 82 44 2 31 2
      Total weight: 338  

 

Planta Greenhouses se dedica a entregar su pedido rápidamente, para que pueda comenzar a utilizar sus productos de invernadero de inmediato.

Debido a que los invernaderos se empaquetan en cajas grandes, tienen requisitos de envío únicos, que incluyen:

  • Nos comunicaremos con usted para confirmar el precio de envío, según su ubicación y el tamaño del pedido.
  • El envío para la mayoría de los pedidos cuesta entre $250 y $450. Las entregas a zonas remotas pueden tener un costo adicional.
  • Al realizar su pedido, asegúrese de introducir el teléfono y la dirección correctos al finalizar la compra. Nos pondremos en contacto con usted por teléfono antes del envío. No nos responsabilizamos de entregas a direcciones incorrectas.
  • Como parte del proceso de entrega, necesitamos un número de teléfono localizable (para que la empresa de mensajería se comunique con usted) antes de enviar el artículo.
  • Haremos todo lo posible para enviar su pedido lo más rápido posible y mediante el medio de transporte que usted especifique. Sin embargo, si no hay instrucciones específicas, aplicaremos nuestro criterio y realizaremos el envío de la manera más rápida y económica. No nos responsabilizamos por retrasos en la entrega debidos a circunstancias ajenas a nuestra voluntad.
  • No realizamos envíos a apartados postales, ya que en la mayoría de los casos deberá firmar para recibir su artículo.
  • No disponemos de servicio de entrega urgente. Los componentes del invernadero se entregan en varias cajas, la más grande de las cuales pesa 36 kg. El invernadero se entregará en la entrada de su casa. Por favor, coordine el traslado del paquete a su ubicación de instalación.
  • Los pedidos realizados los fines de semana y días festivos se procesarán el siguiente día hábil.
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The Beginner's Guide for Greenhouse Owners

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Sigma Greenhouse Gen II Measurements

Sigma 20 (Gen II) · 10′ × 20′

3D view
Side view

Compare Sigma Greenhouse Gen II Sizes

This greenhouse comes in several size configurations. Every greenhouse extends in 6.5 ft sections, so pick the length that fits your plot and your plans.
Price
Sale$2,650
$2,450
Sale$3,350
$3,050
Sale$4,100
$3,700
Sale$4,850
$4,350
About
Beds along both sides and a bench for seed trays: room for a full season of tomatoes and peppers.
Room for in-ground beds, trellised crops and a potting bench.
Long beds on both sides, tall crops at one end and a wheelbarrow-wide path.
Several crop zones, a propagation corner and space for a heater.
Width
10 ft width
10 ft width
10 ft width
10 ft width
Length
13 ft length
20 ft length
26 ft length
32 ft length
Height
7 ft height
7 ft height
7 ft height
7 ft height
Sq ft
130 sq ft
200 sq ft
260 sq ft
320 sq ft
Dome-shaped Greenhouse
About this model

Dome-shaped Greenhouse

Sigma Gen II greenhouse has a dome-shaped arch which sheds snow and rain, and the galvanized pipe frame with 6 mm twin-wall panels is rated for 32 psf of snow.

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Why Planta Greenhouses

Greenhouses that outlast the winters

Heavy-duty kits since 2013, designed for Canadian and northern-US winters and backed by a 5-year warranty, live-chat support and thousands of owners sharing what works.

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Shipping & assembly

Arrives in labeled boxes

Free shipping to the closest terminal in the lower 48. Every panel is pre-cut and every bag of hardware is labeled, so two people can build it with the step-by-step videos.

Questions? Talk to a grower.

Mon–Fri 9am–5pm EST or Send a Message

Call us 1-877-669-1286