Palram-Canopia Glory 8x12
$4,349· Nov 12, 2026
8' x 12' · 95.6 sq ft · 10 mm polycarbonate
Rion · No. 13 of 13 in our ranking
Rion Grand Gardener 8x12 review
7.6/10FairUpdated November 12, 2026 by Megan Hollis
A resin-framed barn greenhouse with twin-wall panels, wide double doors and a 7 ft 10 in peak.
110.8 sq ft4 mm roof, 6 mm wallsSnow: Not statedWind: Not stated
$4,099at Planet Greenhouse, checked November 12, 2026
At a glance: size, peak height, warranty
8'9" x 12'8"7'10" peakNot stated
Free curbside freight delivery to the 48 contiguous states (Planet Greenhouse).
Compare with rivals
Our review
Rion Grand Gardener 8x12: fair, 7.6/10
The Rion Grand Gardener is a handsome barn-style greenhouse with a UV-protected resin frame, 4 mm twin-wall roof, 6 mm twin-wall walls, two roof vents and wide double doors, at $4,099 from Planet Greenhouse on November 12, 2026. It ranks last on our list for one reason: the pages we read publish no snow load, no wind rating and no warranty term, and it needs a concrete or timber foundation (base kit $469 extra).
Buy it if
- You like the look of a resin barn greenhouse
- You plan a permanent foundation anyway
- You want wide doors and good side height
Skip it if
- You want published weather ratings
- You want the best value per square foot
A different kind of frame
Rion is a Palram-Canopia brand, and the Grand Gardener uses heavy-duty, UV-protected extruded resin for the frame, with aluminum profiles in the roof. Resin never rusts or corrodes, and it has a warmer, chunkier look than thin aluminum. The barn-shaped roof keeps the walls tall: 61 in at the sides and 94 in (7 ft 10 in) at the peak. Pin & Lock resin connectors hold it together, and rubber sealing strips help the insulation.
Panels and doors
The twin-wall version we priced has 4 mm twin-wall polycarbonate on the roof and 6 mm twin-wall on the walls, so it holds heat well. The double doors are 47.5 in wide and 76.4 in high, per Planet Greenhouse: wheelbarrow-friendly. Two adjustable roof vents handle airflow, and gutters are included. At 8 ft 9 in by 12 ft 8 in, you get 110.8 sq ft.
Why it ranks last
We could not find a snow load, a wind rating or a warranty term for this twin-wall version on Planet Greenhouse or on canopia.com. That does not mean it is weak. It means we cannot check, and our formula scores what is not published at 2 out of 10 so that a kit cannot win on silence. Add a $4,099 price (about $37 per square foot) and no base in the box, and it ends up last. If you love it, ask the dealer for the snow and warranty figures before ordering.
Foundation and price
Canopia says to secure it to a concrete pad or heavy timber foundation, and Rion's optional base kit was $469 at Planet Greenhouse. The kit itself was $4,099 on November 12, 2026, with free curbside freight to the 48 contiguous states.
What we like, and what to know
- Resin frame that never rusts, with aluminum roof profiles
- Twin-wall panels: 4 mm roof, 6 mm walls
- Double doors 47.5 in wide and 76.4 in high
- Barn-shaped roof: 7 ft 10 in peak and 61 in walls
- Pin & Lock resin connectors, rubber sealing strips
The catch: No snow, wind or warranty figure on the pages we read, so it scores low on three criteria. It needs a concrete pad or heavy timber foundation, and the Rion base kit was $469 extra.
Rion Grand Gardener 8x12 specifications
| Price | $4,099 at Planet Greenhouse, checked November 12, 2026 |
|---|---|
| Footprint | 8'9" x 12'8" · 110.8 sq ft |
| Price per square foot | $36.99/sq ft |
| Panels | 4 mm twin-wall polycarbonate roof and 6 mm twin-wall polycarbonate walls (twin-wall version) |
| Light | Diffused light from the twin-wall panels (no percentage published for this version) |
| Frame | Heavy-duty UV-protected extruded resin frame with aluminum roof profiles (Canopia) |
| Peak height | 7'10" (94 in) |
| Eave (wall) height | 61 in |
| Door | Double doors, 47.5 in wide x 76.4 in high (Planet Greenhouse) |
| Snow load | Not stated |
| Wind rating | Not stated |
| Ventilation | Two adjustable roof vents (Planet Greenhouse) |
| Base | Secure it to a concrete pad or heavy timber foundation; Rion's base kit is optional ($469 at Planet Greenhouse) |
| Gutters | Included |
| Warranty | Not stated |
| Assembly | Pin & Lock assembly with resin connectors (Canopia); plan on two people and a level foundation. |
| Delivery | Free curbside freight delivery to the 48 contiguous states (Planet Greenhouse). |
| Model / SKU | Canopia model #702493 |
7.6/10, criterion by criterion
Each criterion is scored out of 10 from the published figure; anything not published scores 2. Full method.
| Price per square foot (dated, US) (20%) | 4.9/10 |
|---|---|
| Panels: insulation and thickness (20%) | 7.0/10 |
| Published snow load (15%) | Not published: 2.0/10 |
| Warranty (15%) | Not published: 2.0/10 |
| Published wind rating (10%) | Not published: 2.0/10 |
| Headroom (peak height) (10%) | 8.1/10 |
| Ventilation in the box (5%) | 8.0/10 |
| Base or anchoring in the box (5%) | 4.0/10 |
Price and where to buy
$4,099 at Planet Greenhouse on November 12, 2026 (Planet Greenhouse product page (US dealer)).
Free curbside freight delivery to the 48 contiguous states (Planet Greenhouse). No warranty term is stated on the page we read.
Palram-Canopia doesn't sell online in the US, so we link to Planet Greenhouse, a US dealer.
Other kits to consider
Bloomcabin High Tunnel Greenhouse 10x13
$3,372.97$6,132.67· Nov 12, 2026
9'11" x 13'2" · 129 sq ft · 6 mm polycarbonate
YourGreenhouses Arrow Greenhouse 8x13
$2,810· Nov 12, 2026
8.2' x 13' · 106.6 sq ft · 6 mm polycarbonate
Where these figures come from
- planetgreenhouse.com/products/palram-canopia-grand-gardener-8-x-12-greenhouse-twin-wall, read November 12, 2026
- canopia.com/product/grand-gardener-8-ft-x-12-ft-greenhouse-kit, read November 12, 2026
Rion Grand Gardener 8x12: questions
Is Rion the same company as Palram?
Rion is a Palram-Canopia brand; the Grand Gardener has its own page on canopia.com.
Does the Rion Grand Gardener need a foundation?
Yes. Canopia says to secure it to a concrete pad or heavy timber foundation. The optional Rion base kit was $469 at Planet Greenhouse.
What is the warranty on the Rion Grand Gardener?
We did not find a warranty term on the pages we read for this twin-wall version. Ask the dealer before you order.
