Backyard Discovery Bellerose XL 13x11
Rated to 100 mph, but only when anchored as the manual specifies — and the anchoring hardware is included.
23 of 45 fields researched · last updated 2026-08-29
What the manual says that the product page doesn't
NOT stated on the XL page, although the 9x6 and 11x7 pages in the same line both state 10mm. Deliberately NOT inferred — line consistency is an assumption, not a source. Resolve from the manual or spec sheet.
source documentThe manual states hardware for BOTH anchoring methods ships in the box: 'The hardware to mount your greenhouse permanently to a concrete surface is included. This is the recommended anchoring method.' and 'The hardware to mount your greenhouse into a ground surface, such as through gravel into the ground, is included.'
source documentBoth sets included. Hardware for mounting to a WOOD DECK is explicitly NOT included and must be bought separately, with the manual warning to confirm structural support under the deck first.
source documentManual: 'It is critically important that you start with square and level footings or concrete pad.' It explicitly warns AGAINST setting the greenhouse directly on soil or grass, which it says shortens lifespan.
source documentStructure
| Width | 11 ft source |
|---|---|
| Length | 13 ft source |
| Floor area | 143 sq ft source |
| Frame | cedar source |
| Glazing | 4-wall polycarbonate source |
| Panel thickness | not published |
| Panel retention | not published |
Wind, snow and anchoring
| Wind rating | 100 mph source |
|---|---|
| …which assumes | Product must be anchored as specified in the Backyard Discovery instruction manual source |
| Snow depth | 30 in source |
| Anchoring included | Yes source from the manual |
| What ships for anchoring | 16 x 3-inch concrete anchors (recommended method, needs a 5/16in masonry bit) AND 16 x ground stakes source from the manual |
| Foundation required | square and level footings or a concrete pad; concrete pads or posts recommended source from the manual |
Ventilation
| Roof vents | not published |
|---|---|
| Opening windows | 4 easy-open windows, manual source |
| Powered fan included | Yes source |
Ownership
| Warranty | 5 years source |
|---|
Where to buy
Advertised prices, checked daily. Shipping is extra unless the retailer states otherwise — on a greenhouse, freight can change which seller is actually cheapest.
Price alert
Climate notes
Our analysis of the published figures — not a manufacturer claim.
- Hot climates
- A factory-fitted temperature-activated exhaust fan plus 4 opening windows is a stronger starting point than most kits, but community reports show 110-120F inside even with fans, so shade cloth should still be assumed for Gulf/Southwest summers.
- Cold climates
- 4-wall polycarbonate is at the insulating end of the kit market. Manufacturer claims 30% better heat retention; unverified and unquantified as an R-value.
- Exposed and windy sites
- The 100 mph rating is conditional on anchoring per the manual — and the manual DOES supply the hardware: 16 concrete anchors (recommended) or 16 ground stakes. Setting it on bare soil or grass is explicitly warned against. Of the kits compared, this is the best-documented anchoring story.
What we don't know
22 of 45 fields are still unresearched, and fields marked not published mean the manufacturer does not state them — that is a finding about the product, not a gap in our research.
Every figure above links to the document it came from. We have not tested this greenhouse. Local wind, snow, permitting and foundation requirements vary; confirm anything that matters with the manufacturer and your local building authority before buying.