Rion Grand Gardener 8x12
$4,099· Nov 12, 2026
8'9" x 12'8" · 110.8 sq ft · 4 mm roof, 6 mm walls
Palram-Canopia · No. 1 of 13 in our ranking
Palram-Canopia Glory 8x12 review
9.5/10ExcellentUpdated November 12, 2026 by Megan Hollis
The thickest panels on our list, an 8 ft 10 in peak and everything you need in the box.
95.6 sq ft10 mm polycarbonateSnow: 20 lb/ft²Wind: 60 mph
$4,349at Planet Greenhouse, checked November 12, 2026
At a glance: size, peak height, warranty
8' x 12'8'10" peak10-year
Free curbside freight delivery to the 48 contiguous states (Planet Greenhouse).
Compare with rivals
Our review
Palram Glory 8x12: excellent, 9.5/10
The Glory is our No. 1 because it is the only kit here with 10 mm twin-wall polycarbonate on every side, and it comes with the steel base, two automatic roof vents, a louver window and gutters already in the box. You pay for that: $4,349 at Planet Greenhouse on November 12, 2026, about $45 per square foot. If you grow through a real winter and want to buy once, it is the safest pick here.
Buy it if
- You garden through frosty nights and want the panels to keep the heat in
- You are tall, or you plan shelves and hanging baskets at head height
- You would rather pay once than add vents, openers and a base later
Skip it if
- Your budget stops around $2,000 (look at the Palram Essence)
- You need the most floor space per dollar (the YourGreenhouses Polycarbonate gives 128 sq ft for $2,765)
What the 10 mm panels change
Most kits in this price range use 4 mm or 6 mm twin-wall sheets. The Glory doubles that on every face. Twin-wall means two skins with an air gap between them, and a thicker gap holds heat better on a still, frosty night. In practice that is the difference between a greenhouse that is only frost-free with a heater running hard and one where a small heater ticks over. Dealer specs put light transmission at 79%, diffused, which is a little lower than the 82% of the 4 mm Palram kits. Diffused light is kind to seedlings: no hard shadows, fewer scorched leaves in July.
The frame is a reinforced aluminum one in charcoal gray. Planet Greenhouse lists the kit at 20 lb/ft² of snow and 60 mph of wind. Those are honest, middle-of-the-road numbers. In heavy-snow country you still brush the roof after a big storm.
Room to work
The roof peaks at 105.5 in, so 8 ft 10 in, and the walls rise to 75.1 in before the roof starts. That second figure matters more than people think: with a low eave, you can only stand up straight in a strip down the middle. Here you can work at a bench along the side wall without ducking. The 31.7 in door with its threshold ramp takes a wheelbarrow, and at 95.6 sq ft you get room for two benches and a center path, or one bench and a row of tomatoes in the ground.
What comes in the box
This is where the price starts to make sense. Two roof vents with automatic openers, a side louver window, a galvanized steel base with a ground anchoring system, rain gutters and plant hangers are all included, per Planet Greenhouse. On cheaper kits those are add-ons, and each one is another order and another weekend. Palram-Canopia says no special tools are needed. Plan on two people and a level spot.
Price, delivery and warranty
Planet Greenhouse, a US dealer, listed it at $4,349 on November 12, 2026, with free curbside freight delivery to the 48 contiguous states. Palram-Canopia does not sell this kit online in the US, so we link to that dealer. The 10-year limited warranty is the longest of the Palram kits we compared; the others carry five years.
What we like, and what to know
- 10 mm twin-wall polycarbonate on the roof and all walls: the best insulation on our list
- 8 ft 10 in at the peak and a 75 in eave, so you stand up straight even at the sides
- Two roof vents with automatic openers plus a side louver: summer heat handles itself
- Galvanized steel base, anchoring, gutters and plant hangers included
- 10-year limited warranty, twice the other Palram kits here
The catch: At $45 per square foot it costs more than twice the YourGreenhouses Polycarbonate per square foot, and its 20 lb/ft² snow rating is below the 32 to 38 lb/ft² the YourGreenhouses tunnels publish.
Palram Glory 8x12 specifications
| Price | $4,349 at Planet Greenhouse, checked November 12, 2026 |
|---|---|
| Footprint | 8' x 12' · 95.6 sq ft |
| Price per square foot | $45.49/sq ft |
| Panels | 10 mm twin-wall polycarbonate on the roof and all walls |
| Light | 79% light transmission (dealer spec table), diffused |
| Frame | Gray powder-coated aluminum frame, reinforced (Canopia: "extra-thick") |
| Peak height | 8'10" (105.5 in) |
| Eave (wall) height | 75.1 in |
| Door | Heavy-duty lockable door, 31.7 in wide, with threshold ramp |
| Snow load | 20 lb/ft² of snow (Planet Greenhouse) |
| Wind rating | 60 mph (dealer spec table) |
| Ventilation | Two roof vents with automatic openers plus a side louver window |
| Base | Galvanized steel base and ground anchoring system included (Planet Greenhouse) |
| Gutters | Included |
| Warranty | 10-year limited warranty (Palram-Canopia, per the dealer and canopia.com). |
| Assembly | DIY kit, no special tools needed per Palram-Canopia; plan on two people. |
| Delivery | Free curbside freight delivery to the 48 contiguous states (Planet Greenhouse). |
| Model / SKU | HG5612 (Canopia model #702208) |
9.5/10, 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%) | 4.2/10 |
|---|---|
| Panels: insulation and thickness (20%) | 9.5/10 |
| Published snow load (15%) | 7.5/10 |
| Warranty (15%) | 8.5/10 |
| Published wind rating (10%) | 7.2/10 |
| Headroom (peak height) (10%) | 9.9/10 |
| Ventilation in the box (5%) | 10.0/10 |
| Base or anchoring in the box (5%) | 10.0/10 |
Price and where to buy
$4,349 at Planet Greenhouse on November 12, 2026 (Planet Greenhouse product page (US dealer)).
Free curbside freight delivery to the 48 contiguous states (Planet Greenhouse). 10-year limited warranty (Palram-Canopia, per the dealer and canopia.com).
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-glory-8-x-12-greenhouse, read November 12, 2026
- canopia.com/product/glory-8-ft-x-12-ft-greenhouse-kit, read November 12, 2026
Palram Glory 8x12: questions
Is the Palram Glory worth the extra money over the Essence?
Yes if you grow in winter. The Glory has 10 mm panels instead of 4 mm, a taller frame, automatic vent openers and a 10-year warranty instead of five. For spring and summer growing in a mild area, the Essence at $1,899 does most of the job.
Does the Palram Glory 8x12 need a foundation?
It comes with a galvanized steel base and a ground anchoring system, per Planet Greenhouse. You still need a level, firm spot; many owners set the base on pavers, a gravel pad or a timber frame.
How much snow can the Palram Glory hold?
Planet Greenhouse lists 20 lb/ft² of snow. Brush heavy, wet snow off the roof after big storms rather than letting it build up.
Can I heat the Glory in winter?
Yes. Its 10 mm twin-wall panels are the best insulators on our list, so a heater works less hard than in a 4 mm or single-layer kit. Size the heater for your coldest nights and keep one vent able to open on sunny days.
