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Octagonal Cedar Half-Boarded Greenhouse – Premium Cedar Build, Elegant Garden Focal Point

by Alton
Save $750.00
Original Price $20,000.00
Current Price $19,250.00

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No Sales Tax—Except in Michigan

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(844) 873-5764

Description

Wooden Greenhouse for Year-Round Growing

Take full control of your growing environment with this powerful cedar greenhouse. Built for serious gardeners, it delivers long-lasting durability through Grade 1 Western Cedar, tempered glass glazing, and traditional mortise-tenon joinery. Whether you’re creating a backyard sanctuary, cultivating edibles, or curating delicate plants — this model gives you pro-level growing conditions with timeless beauty.

Alton Octagonal Cedar Greenhouse front view


✅ Quick-Glance Benefits 

🌿 Premium Cedar Frame Crafted from Grade 1 Western Red Cedar, dipped & sealed for durability
🏡 Octagonal Design Unique shape transforms your yard into a stunning focal point
🪟 Tempered Safety Glass 3mm glazing ensures clarity, safety, and strength
🌬️ Superior Ventilation 2 auto roof vents + 2 louvered windows for airflow
🚪 Secure Double Doors Inward-swinging with keyed lock for convenience
🚚 Fast, Free U.S. Shipping Delivered quickly, ready for easy assembly

 

 

What’s Included

  • 3mm safety glass with screw-in aluminum capping
  • Hinged lockable double doors - wide opening
  • Victorian style aluminum guttering with downspout
  • Automatic opening roof vents (2)
  • Louvre windows (2)
  • Octagonal shelf staging (2) sides
  • Octagonal shelf staging infill (3rd side shelf shape)
  • Upper shelf (mounts higher in greenhouse)
  • Octagonal Cedar Half-Boarded Greenhouse

Use It For

✔️ Year-round plant protection
✔️ Growing flowers, herbs, or vegetables
✔️ Specialty plant collections & delicate species
✔️ Estate gardens & decorative landscaping


🔍 Standout Features

🪵 Half-Boarded Cedar Walls Provides added privacy, insulation, and a refined look
🛠️ Stainless Steel Hardware Rust-resistant fittings ensure long-term durability in any climate
📏 Aluminum Base Frame Raises the structure above ground level to prevent moisture damage
🪑 Full Slat Shelving Kit Includes 2 narrow and 4 wide shelves for organized growing space
👑 Victorian Cresting An elegant, traditional touch to the roofline

 

 


Ready to upgrade your grow setup?

Order the Octagonal Cedar Half-Boarded Greenhouse today and take full control of your growing environment — with lasting beauty and reliable performance.


Octagonal Cedar Half-Boarded Greenhouse Specifications

Glazing: Toughened safety glass with screw-in bar clamping (capping)
Frame: Extra strong cedar

9x12

  • Length: 11'10'"
  • Width: 9'2"
  • Peak Height: 9'8"
  • Area: 101 sq. ft.
  • Doors: Hinged Double Doors
  • Windows: 2 Roof Vents, 2 Louvre Window
  • Window Openers: 2 Automatic (Roof), 2 Manual (Louvre)

Dimensions

Evolution Octagonal Cedar Greenhouse (11'10" x 9'2") Dimensions
  • A: Base Width 3611 mm (11ft10)
  • B: Length 2800 mm (9ft2)
  • C: Eaves Height 1989 mm (6ft6)
  • D: Ridge Height 2948 mm (9ft8)
  • E: Door Width 1460 mm (4ft9)
  • F: Door height 1810 mm (5ft11)

Octagonal Cedar Half-Boarded Greenhouse User Manual

 

Octagonal Greenhouse Assembly 9x12 Instructions
Octagonal Greenhouse 9x12 Base Plan
Octagonal Double Door Instructions
Cedar Greenhouse Drying, Treating and Maintaining Manual
Gutter and Downspout Manual
Optional Staging/Shelving Manual
Greenhouse Base Dimensions

Octagonal Cedar Half-Boarded Greenhouse Warranty

Manufacturer Warranty: 10 Years

  • Covers defects in materials and workmanship

  • Support handled directly through our team


FAQ

Q: Will this fit in my backyard?
A: Yes, its 9'2" x 12'10" footprint makes it ideal for medium to large gardens.

Q: Does it include shelving?
A: Yes, a full cedar slat shelving kit is included.

Q: What kind of glass is used?
A: 3mm tempered safety glass for clarity and safety.

Q: Can I customize the look?
A: Optional Victorian cresting is available for a decorative finish.

Q: What’s the warranty?
A: 10-year manufacturer warranty on materials and craftsmanship.

Videos


Warranty

10-Year Limited Warranty on Frame and Aluminum Base Components

 

Why Buy From US

Who We Are

At Garden GrowShop, we're not a faceless online retailer. We're a small, family-run business with real roots in the growing community. Every product we carry has been carefully chosen to meet the needs of both home growers and commercial operators — because we’ve walked in your shoes.

Personal, Knowledgeable Support
When you reach out to us, you’re not getting a canned reply or being passed between departments. You're talking to someone who actually knows the products, understands your challenges, and is here to help you succeed.

Transparent Pricing — No Gimmicks
We believe in fair, honest pricing. No inflated markups, no bait-and-switch tactics. If you ever find a better price on the same item, let us know — we’ll match it without the hassle.

Fast, Dependable Shipping
We ship directly from warehouses across the U.S. to get your order to you quickly and reliably. No inflated delivery timelines, and no surprise shipping fees — just smooth, on-time delivery you can count on.

A Partnership, Not a Transaction
Our customers stick with us because we treat them like partners. Whether you're outfitting a small indoor setup or managing a large-scale operation, we’re here to grow with you — not just sell you equipment.

Our Commitment
If something goes wrong, we don’t pass the buck. We work with you directly to make it right. That’s how we’ve built our business, and that’s how we plan to keep it.

Shipping/ Returns

Shipping Policy

Free Shipping Within the Continental U.S.

We offer free shipping on all orders over $200 shipped to addresses within the continental United States. Orders under $200 will have shipping calculated at checkout. There are no hidden fees or handling charges. The price you see at checkout is the final price you pay.

Order Processing

Orders are typically processed within 1–2 business days (Monday–Friday). If an item is temporarily backordered or delayed, we’ll notify you by email with an updated shipping estimate.

Shipping Confirmation & Tracking

Once your order has shipped, we’ll email you a shipping confirmation that includes tracking information. You can use this to monitor the delivery status of your package in real time.

Where Orders Ship From

We partner with trusted suppliers and manufacturers who maintain warehouse locations throughout the United States. Orders are typically shipped from the facility closest to your delivery address to ensure faster transit times and greater efficiency. Some orders may ship in multiple packages depending on item availability and warehouse location.

Estimated Delivery Time

Most orders arrive within 3–7 business days of shipping, depending on your location and the item’s warehouse origin. Freight items and oversized packages may take additional time.

Shipping Carriers

We use trusted carriers such as FedEx, UPS, USPS, and professional freight delivery services for large or heavy items. Depending on the size of your order, it may arrive in multiple packages or from multiple warehouses.

Delivery and Moving Disclaimer

Please note: We do not offer moving or installation services. For freight shipments or large items, carriers are only responsible for curbside delivery. Drivers are not required to move items inside your home, up stairs, or to specific locations. We strongly recommend having assistance available at the time of delivery for heavy or bulky shipments.

Address Accuracy & Order Changes

Please ensure your shipping address is correct at the time of checkout. Once an order has shipped, we are unable to change the delivery address or reroute the shipment. If you need to make changes to your order, contact us immediately after placing it.

Damaged or Lost Shipments

If your order arrives damaged or appears to be lost in transit, contact us within 48 hours of delivery (or expected delivery). We will work with the carrier to resolve the issue as quickly as possible.

Shipping Restrictions

We currently ship only to addresses within the continental United States. We do not ship to Alaska, Hawaii, U.S. territories, or international destinations.

Questions?

If you have questions about your order, delivery, or shipping process, feel free to reach out to us through our Contact Us page or via email (sales@gardengrowshop.com ). We’re here to help.

Start of Returns section 

Easy Returns, No Surprises

At Garden GrowShop, we stand behind the quality of every product we carry. But we also understand that sometimes things just don’t work out — and that’s okay. If you change your mind or the item isn’t quite what you expected, we’ve got you covered.

30-Day Return Guarantee

You have 30 days from the date of delivery to request a return for any reason. To start a return, simply email us at sales@gardengrowshop.com with your order number and we’ll walk you through the process.

Here’s what to expect:

  • You’ll receive clear return instructions from our team.

  • Once your item is received and inspected, we’ll issue a refund to your original payment method.

  • Items must be returned in “like new” condition, with all original packaging and accessories.

  • Return shipping costs are the responsibility of the customer.

“Like new” means no visible wear, damage, or missing parts. Items showing signs of use or misuse may not qualify for a refund.


Damaged or Defective Orders

If your order arrives damaged or defective, don’t worry — we’ll take care of it.

Here’s what to do:

  • Note any damage with the delivery driver when signing for the package.

  • Email photos and a description of the issue to sales@gardengrowshop.com on the same day you receive it.

  • We’ll cover the cost of return shipping and make sure a replacement is sent out quickly.

Please keep all original packaging in case a return is needed. This helps speed up the process and ensures a smooth resolution.


Order Cancellations

If you need to cancel your order, please contact us as soon as possible at sales@gardengrowshop.com or by phone.

  • Cancellations before shipment receive a full refund.

  • Cancellations after shipment will follow our standard return policy and may be subject to return shipping costs.


Important Return Notes:

  • Certain products may have brand-specific return restrictions, which will be noted on the product page.

  • Products purchased for temporary or single-use purposes (e.g. trade shows, promotional events) are not eligible for return.


We’re Here to Help

Our goal is to make returns and exchanges as easy as possible — with no stress and no surprises. If you’re unsure whether your order qualifies or just want to ask a question, don’t hesitate to reach out. We’re here to make sure you feel confident before and after your purchase.

Help Us Improve

We’d love to hear from you!
If you decided not to purchase today, we’d like to know what held you back. Your feedback helps us improve and serve you better.

 Was it the price, product description, reviews, shipping options, or something else? Tell us what made you hesitate, and we’ll send you a 5% discount code for your next order (valid on select products).

Why Garden GrowShop?

We’re an authorized dealer for every brand we sell—so you’ll always get full manufacturer warranties, premium support, and authentic gear direct from the source.

✅ Fast, tracked shipping on all orders
✅ 100% safe and secure checkout
✅ No restocking fees on returns
✅ Friendly U.S.-based support when you need it

Have questions? We're here to help. Whether you're just getting started or scaling up a full grow, our experts can guide you to the right gear.

Customer Reviews

Based on 5 reviews
100%
(5)
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0%
(0)
0%
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0%
(0)
M
Melissa C.
Compact but functional

We didn’t have room for a large greenhouse, so the Octagonal was perfect. There’s still plenty of space inside and it looks incredible from every angle.

J
James P.
Easy to assemble and worth the price

The instructions were clear and everything fit together well. Once built, it was clear this was a premium structure. Love the wood finish!

K
Karen M.
Beautiful centerpiece for our garden

The octagonal design is absolutely stunning. It doesn’t just grow plants—it elevates the entire look of our backyard. The cedar smells amazing, and it's built to last.

D
Diana H.
Great for year-round use

This greenhouse stays warm even in early spring, and it’s ventilated well enough for summer. A great investment.

T
Todd L.
Solid construction and great light

I love the way sunlight pours in from every angle. The build quality is outstanding and it handled our winter storms without any issues.

Description

Wooden Greenhouse for Year-Round Growing

Take full control of your growing environment with this powerful cedar greenhouse. Built for serious gardeners, it delivers long-lasting durability through Grade 1 Western Cedar, tempered glass glazing, and traditional mortise-tenon joinery. Whether you’re creating a backyard sanctuary, cultivating edibles, or curating delicate plants — this model gives you pro-level growing conditions with timeless beauty.

Alton Octagonal Cedar Greenhouse front view


✅ Quick-Glance Benefits 

🌿 Premium Cedar Frame Crafted from Grade 1 Western Red Cedar, dipped & sealed for durability
🏡 Octagonal Design Unique shape transforms your yard into a stunning focal point
🪟 Tempered Safety Glass 3mm glazing ensures clarity, safety, and strength
🌬️ Superior Ventilation 2 auto roof vents + 2 louvered windows for airflow
🚪 Secure Double Doors Inward-swinging with keyed lock for convenience
🚚 Fast, Free U.S. Shipping Delivered quickly, ready for easy assembly

 

 

What’s Included

  • 3mm safety glass with screw-in aluminum capping
  • Hinged lockable double doors - wide opening
  • Victorian style aluminum guttering with downspout
  • Automatic opening roof vents (2)
  • Louvre windows (2)
  • Octagonal shelf staging (2) sides
  • Octagonal shelf staging infill (3rd side shelf shape)
  • Upper shelf (mounts higher in greenhouse)
  • Octagonal Cedar Half-Boarded Greenhouse

Use It For

✔️ Year-round plant protection
✔️ Growing flowers, herbs, or vegetables
✔️ Specialty plant collections & delicate species
✔️ Estate gardens & decorative landscaping


🔍 Standout Features

🪵 Half-Boarded Cedar Walls Provides added privacy, insulation, and a refined look
🛠️ Stainless Steel Hardware Rust-resistant fittings ensure long-term durability in any climate
📏 Aluminum Base Frame Raises the structure above ground level to prevent moisture damage
🪑 Full Slat Shelving Kit Includes 2 narrow and 4 wide shelves for organized growing space
👑 Victorian Cresting An elegant, traditional touch to the roofline

 

 


Ready to upgrade your grow setup?

Order the Octagonal Cedar Half-Boarded Greenhouse today and take full control of your growing environment — with lasting beauty and reliable performance.


Octagonal Cedar Half-Boarded Greenhouse Specifications

Glazing: Toughened safety glass with screw-in bar clamping (capping)
Frame: Extra strong cedar

9x12

  • Length: 11'10'"
  • Width: 9'2"
  • Peak Height: 9'8"
  • Area: 101 sq. ft.
  • Doors: Hinged Double Doors
  • Windows: 2 Roof Vents, 2 Louvre Window
  • Window Openers: 2 Automatic (Roof), 2 Manual (Louvre)

Dimensions

Evolution Octagonal Cedar Greenhouse (11'10" x 9'2") Dimensions
  • A: Base Width 3611 mm (11ft10)
  • B: Length 2800 mm (9ft2)
  • C: Eaves Height 1989 mm (6ft6)
  • D: Ridge Height 2948 mm (9ft8)
  • E: Door Width 1460 mm (4ft9)
  • F: Door height 1810 mm (5ft11)

Octagonal Cedar Half-Boarded Greenhouse User Manual

 

Octagonal Greenhouse Assembly 9x12 Instructions
Octagonal Greenhouse 9x12 Base Plan
Octagonal Double Door Instructions
Cedar Greenhouse Drying, Treating and Maintaining Manual
Gutter and Downspout Manual
Optional Staging/Shelving Manual
Greenhouse Base Dimensions

Octagonal Cedar Half-Boarded Greenhouse Warranty

Manufacturer Warranty: 10 Years

  • Covers defects in materials and workmanship

  • Support handled directly through our team


FAQ

Q: Will this fit in my backyard?
A: Yes, its 9'2" x 12'10" footprint makes it ideal for medium to large gardens.

Q: Does it include shelving?
A: Yes, a full cedar slat shelving kit is included.

Q: What kind of glass is used?
A: 3mm tempered safety glass for clarity and safety.

Q: Can I customize the look?
A: Optional Victorian cresting is available for a decorative finish.

Q: What’s the warranty?
A: 10-year manufacturer warranty on materials and craftsmanship.

Videos


Warranty

10-Year Limited Warranty on Frame and Aluminum Base Components

 

Why Buy From US

Who We Are

At Garden GrowShop, we're not a faceless online retailer. We're a small, family-run business with real roots in the growing community. Every product we carry has been carefully chosen to meet the needs of both home growers and commercial operators — because we’ve walked in your shoes.

Personal, Knowledgeable Support
When you reach out to us, you’re not getting a canned reply or being passed between departments. You're talking to someone who actually knows the products, understands your challenges, and is here to help you succeed.

Transparent Pricing — No Gimmicks
We believe in fair, honest pricing. No inflated markups, no bait-and-switch tactics. If you ever find a better price on the same item, let us know — we’ll match it without the hassle.

Fast, Dependable Shipping
We ship directly from warehouses across the U.S. to get your order to you quickly and reliably. No inflated delivery timelines, and no surprise shipping fees — just smooth, on-time delivery you can count on.

A Partnership, Not a Transaction
Our customers stick with us because we treat them like partners. Whether you're outfitting a small indoor setup or managing a large-scale operation, we’re here to grow with you — not just sell you equipment.

Our Commitment
If something goes wrong, we don’t pass the buck. We work with you directly to make it right. That’s how we’ve built our business, and that’s how we plan to keep it.

Shipping/ Returns

Shipping Policy

Free Shipping Within the Continental U.S.

We offer free shipping on all orders over $200 shipped to addresses within the continental United States. Orders under $200 will have shipping calculated at checkout. There are no hidden fees or handling charges. The price you see at checkout is the final price you pay.

Order Processing

Orders are typically processed within 1–2 business days (Monday–Friday). If an item is temporarily backordered or delayed, we’ll notify you by email with an updated shipping estimate.

Shipping Confirmation & Tracking

Once your order has shipped, we’ll email you a shipping confirmation that includes tracking information. You can use this to monitor the delivery status of your package in real time.

Where Orders Ship From

We partner with trusted suppliers and manufacturers who maintain warehouse locations throughout the United States. Orders are typically shipped from the facility closest to your delivery address to ensure faster transit times and greater efficiency. Some orders may ship in multiple packages depending on item availability and warehouse location.

Estimated Delivery Time

Most orders arrive within 3–7 business days of shipping, depending on your location and the item’s warehouse origin. Freight items and oversized packages may take additional time.

Shipping Carriers

We use trusted carriers such as FedEx, UPS, USPS, and professional freight delivery services for large or heavy items. Depending on the size of your order, it may arrive in multiple packages or from multiple warehouses.

Delivery and Moving Disclaimer

Please note: We do not offer moving or installation services. For freight shipments or large items, carriers are only responsible for curbside delivery. Drivers are not required to move items inside your home, up stairs, or to specific locations. We strongly recommend having assistance available at the time of delivery for heavy or bulky shipments.

Address Accuracy & Order Changes

Please ensure your shipping address is correct at the time of checkout. Once an order has shipped, we are unable to change the delivery address or reroute the shipment. If you need to make changes to your order, contact us immediately after placing it.

Damaged or Lost Shipments

If your order arrives damaged or appears to be lost in transit, contact us within 48 hours of delivery (or expected delivery). We will work with the carrier to resolve the issue as quickly as possible.

Shipping Restrictions

We currently ship only to addresses within the continental United States. We do not ship to Alaska, Hawaii, U.S. territories, or international destinations.

Questions?

If you have questions about your order, delivery, or shipping process, feel free to reach out to us through our Contact Us page or via email (sales@gardengrowshop.com ). We’re here to help.

Start of Returns section 

Easy Returns, No Surprises

At Garden GrowShop, we stand behind the quality of every product we carry. But we also understand that sometimes things just don’t work out — and that’s okay. If you change your mind or the item isn’t quite what you expected, we’ve got you covered.

30-Day Return Guarantee

You have 30 days from the date of delivery to request a return for any reason. To start a return, simply email us at sales@gardengrowshop.com with your order number and we’ll walk you through the process.

Here’s what to expect:

  • You’ll receive clear return instructions from our team.

  • Once your item is received and inspected, we’ll issue a refund to your original payment method.

  • Items must be returned in “like new” condition, with all original packaging and accessories.

  • Return shipping costs are the responsibility of the customer.

“Like new” means no visible wear, damage, or missing parts. Items showing signs of use or misuse may not qualify for a refund.


Damaged or Defective Orders

If your order arrives damaged or defective, don’t worry — we’ll take care of it.

Here’s what to do:

  • Note any damage with the delivery driver when signing for the package.

  • Email photos and a description of the issue to sales@gardengrowshop.com on the same day you receive it.

  • We’ll cover the cost of return shipping and make sure a replacement is sent out quickly.

Please keep all original packaging in case a return is needed. This helps speed up the process and ensures a smooth resolution.


Order Cancellations

If you need to cancel your order, please contact us as soon as possible at sales@gardengrowshop.com or by phone.

  • Cancellations before shipment receive a full refund.

  • Cancellations after shipment will follow our standard return policy and may be subject to return shipping costs.


Important Return Notes:

  • Certain products may have brand-specific return restrictions, which will be noted on the product page.

  • Products purchased for temporary or single-use purposes (e.g. trade shows, promotional events) are not eligible for return.


We’re Here to Help

Our goal is to make returns and exchanges as easy as possible — with no stress and no surprises. If you’re unsure whether your order qualifies or just want to ask a question, don’t hesitate to reach out. We’re here to make sure you feel confident before and after your purchase.

Help Us Improve

We’d love to hear from you!
If you decided not to purchase today, we’d like to know what held you back. Your feedback helps us improve and serve you better.

 Was it the price, product description, reviews, shipping options, or something else? Tell us what made you hesitate, and we’ll send you a 5% discount code for your next order (valid on select products).

Why Garden GrowShop?

We’re an authorized dealer for every brand we sell—so you’ll always get full manufacturer warranties, premium support, and authentic gear direct from the source.

✅ Fast, tracked shipping on all orders
✅ 100% safe and secure checkout
✅ No restocking fees on returns
✅ Friendly U.S.-based support when you need it

Have questions? We're here to help. Whether you're just getting started or scaling up a full grow, our experts can guide you to the right gear.