OCTAGONAL RANGE Greenhouse With Wooden Bar Capping


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Evolution Octagonal Cedar Greenhouse
The clever design of the Alton Evolution has created a cedar greenhouse that is ideal for modern needs, and by using innovative and strong jointing technology, the Evolution models are delivered flat packed in a self-assembly format. This removes a large amount of cost from the double handling and storage of large unwieldy glazed panels used on other models, and put simply this allows us to put more wood into the greenhouse.

The result is an extremely strong, high quality cedar greenhouse.

The best type of wood – and more of it!

The frame is made from Canadian Western Red Cedar, which is extremely high in natural preservative oils which, even without further artificial treatment, make it virtually immune from decay. Cedar also has a unique subtle aroma which can deter pests. The frame is based on mostly planed 2×2 (44x44mm) and 3×2 (69x44mm)

We factory treat your Alton Evolution greenhouse in a clear treatment – thus not masking the natural colour variation of the cedar wood. In time, your greenhouse will mellow into a silvery colour which is so distinctive to cedar. The Moss colour of the metal components is designed to blend in perfectly with this mature silvery colour.

– A metal base keeps the wood well away from the damp area on the floor

– Louvres and Automatic roof vents are standard.

– High Eaves – often overlooked by greenhouse buyers, but it is important to consider. High eaves means the greenhouse feels a lot bigger, and it is far more comfortable for you to work in.

– The guttering and downpipes are included as standard.

– Glass overlaps at eaves, protecting a vulnerable area of your greenhouse from rot.

Evolution Octagonal Cedar Greenhouse
A: Base Width 1989 mm (6ft6) to 3611 mm (11ft10)
B: Length 1989 mm (6ft6) to 2800 mm (9ft2)
C: Eaves Height 1884 mm (6ft2)
D: Ridge Height 2500 mm (8ft2)
E: Door Width 649 mm (2ft1)
F: Door height 1810 mm (5ft11)

Aluminium Bar Capping in Moss Green
Western red cedar cladding
Western Red Cedar
Toughened glass
Free 10 Year Guarantee
2 x Louvre vents
Gutter and a single down pipe
High eaves
Low level threshold
Staging and shelving included
Hinged single door
Installation available for a fee

* The Ultimate Package includes an upgrade to aluminium bar capping from the standard cedar capping, all-round aluminium staging and 2 high level shelves in moss green.

Additional information




Cedar Wood

Measurements Metric

1989mm x 1989mm to 2800mm x 3611mm, 1989mm x 1989mm, 1989mm x 2800mm, 2800mm x 2800mm, 2800mm x 3611mm

Measurements Imperial

6'6" x 6'6" to 9'2" x 11'10", 6'6" x 6'6", 6'6" x 9'2", 9'2" x 9'2", 9'2" x 11'10"

Estimated Delivery

4 weeks

Guarantee Length

10 Years

Installation included


Delivery cost included


Made in



6'6" x 6'6"- (3.28 m2), 6'6" x 9'2"- (7.16 m2), 9'2" x 9'2"- (7.16 m2), 9'2" x 11'10"- (9.43 m2)