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Alton Octagonal Cedar Greenhouse

  • Regular price $ 19,250.00
  • 2 available

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X-Tall Octagonal cedar Greenhouse from Alton brings a touch of modern elegance and horticultural practicality to your garden. Made from warm-hued Western Red Cedar with rot-resistant properties, this spacious high-eaves model features a tall design with cupola. With its two high-level side louvre vents and two automatic roof vents, which open and close with temperature changes, the greenhouse ensures excellent ventilation, drawing in cool air and expelling warm air.

Talk to a Greenhouse Specialist: We're a greenhouse specialist, not a general retailer — call or text us at 732-806-7959 and you'll talk to someone who actually knows this product inside and out. We'll help you plan out accessories and get you a straightforward price.

Accessories

Comes Standard With

  • 3mm safety glass with screw in cedar capping
  • Hinged lockable double doors - wide opening
  • Victorian style aluminum guttering with downspout
  • Cupola with roof vents
  • Automatic opening roof vents (2)
  • Louvre windows (2)

Optional Accessory Kit:

  • Octagonal shelf staging (2) sides
  • Octagonal shelf staging infill (3rd side shelf shape)
  • Upper shelf (mounts higher in greenhouse)

We can offer you extra accessories and shelving free — call 732-806-7959!

About Alton by Exaco

The Octagonal is built by Alton UK, a British cedar greenhouse maker in continuous production since 1921, imported exclusively to the U.S. by Exaco Trading — World of Greenhouses is an authorized Alton dealer. Every Alton greenhouse shares the same build quality: grade-1 Western Red Cedar (no knots) dipped to resist water absorption, a steep 45° roof pitch so snow slides off, tongue-and-groove assembly with solid aluminum gussets at every joint, an aluminum base profile that lifts the frame 1" off the ground, aluminum bar capping over the glazing, 3mm tempered safety glass, pre-assembled doors and windows, and automatic enrollment in a 10-year warranty.

  • Unique octagon cedar glass greenhouse: distinctive tall design with cupola creates a stunning backyard retreat and maximizes space for gardening
  • Premium Cedar & Aluminum construction: Western Red Cedar with an aluminum base that prevents direct ground contact, minimizing early rot; thick glazing timber bars provide exceptional strength and stability
  • Enhanced insulation & durability: aluminum bar capping and thick glazing timber bars improve insulation and strength
  • Superior ventilation: roof vents and large side windows provide excellent airflow, preventing heat buildup and promoting a healthy environment
  • Includes a lockable double hinged door with a wide opening, plus Victorian-style aluminum guttering with downspout

Glazing: toughened safety glass with screw-in bar clamping (capping). Frame: extra strong cedar, grade 1 (no knots), dipped in a special solution to age better and prevent water absorption.

  • 3mm glass: .95 R-Value
  • Red cedar: 1.35 R-Value
  • Glazing timber bars: 44x44mm and 44x69mm

9x12

  • Length: 12'10", Width: 9'2"
  • Peak Height: 9'8"
  • Area: 101 sq. ft.
  • Doors: hinged double doors
  • Windows: 2 roof vents, 2 louvre windows
  • Window Openers: 2 automatic (roof), 2 manual (louvre)

Financing Available: Get Started

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Alton Octagonal Cedar Greenhouse - 9'x12' / No Accessory Kit

$ 19,250.00

Questions & Answers

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  • The photos show several distinct sizes and configurations of the greenhouse, yet there are no selections nor options available on the order form. How do I specify the exact configuration I'd like to order?

    I would love to discuss the Alton Octagonal greenhouse with you. The standard size is  12'10" L x 9'2" W - includes 2 Roof Vents with auto openers, 2 louvered windows with manual openers, and single hinged door. It includes the  Capping, 2 slat 12" wide shelf on end & 4 slat 20" wide shelves in U shape. We can offer you an excellent price, if you are looking for a custom size, I will get you a quote, please let me know what size you are looking for and what location this is shipping to. I am looking forward to working with you.