{"title":"Walk-In Greenhouse Kits","description":null,"products":[{"product_id":"grandio-summit-12x20","title":"Grandio Summit 12x20 Greenhouse Kit","description":"\u003ch2\u003eGrandio Summit 12x20 Greenhouse Kit – 240 Sq Ft of Commercial-Grade Growing Space\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eGrandio Summit 12x20 Greenhouse Kit\u003c\/strong\u003e is the largest configuration in Grandio's Summit barn-style lineup, offering an expansive \u003cstrong\u003e240 square feet\u003c\/strong\u003e of growing space with a \u003cstrong\u003e9.25-foot peak height\u003c\/strong\u003e. Built to commercial-grade standards yet designed for dedicated home gardeners, the Summit 12x20 gives you the room to grow vegetables, flowers, herbs, and tropical plants year-round all in one beautifully engineered structure.\u003c\/p\u003e\n\u003ch3\u003eWhat Makes the Grandio Summit 12x20 Stand Out?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e240 Square Feet of Growing Space\u003c\/strong\u003e – Grandio's largest Summit model, with room for dedicated growing zones, a full workbench, raised beds, and storage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9.25-Foot Peak Height\u003c\/strong\u003e – Exceptional vertical clearance for tall plants, hanging baskets, trellises, and vertical growing systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10mm Twin-Wall Polycarbonate Panels\u003c\/strong\u003e – Premium insulation retains heat in winter and diffuses sunlight evenly for healthier, more productive plants year-round.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeaviest-Duty Powder-Coated Aluminum Frame\u003c\/strong\u003e – Grandio's most robust frame — rust-proof, corrosion-resistant, and engineered for extreme snow loads and high winds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Snow Load Kit\u003c\/strong\u003e – Winter-ready right out of the box with no additional purchases required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLockable Double Sliding Doors\u003c\/strong\u003e – Wide, smooth-gliding entry with security locks for easy access and peace of mind.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoof Vents for Airflow\u003c\/strong\u003e – Maintain the ideal growing temperature and prevent overheating during warm months.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-In Rain Gutters\u003c\/strong\u003e – Clean water management protects your foundation and keeps the perimeter tidy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBold Barn-Style Design\u003c\/strong\u003e – Maximizes vertical growing space and adds striking curb appeal to any backyard or property.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow Big Is the Grandio Summit 12x20?\u003c\/h3\u003e\n\u003cp\u003eThe Summit 12x20 measures \u003cstrong\u003e12 feet wide by 20 feet long\u003c\/strong\u003e, providing \u003cstrong\u003e240 square feet\u003c\/strong\u003e of interior growing space with a \u003cstrong\u003e9.25-foot peak height\u003c\/strong\u003e. It is the largest Summit model available and offers \u003cstrong\u003e48 more square feet\u003c\/strong\u003e than the 12x16 and \u003cstrong\u003e96 more square feet\u003c\/strong\u003e than the 12x12, making it the ideal choice for gardeners who want to maximize their growing operation.\u003c\/p\u003e\n\u003ch3\u003eHow Does the Summit 12x20 Compare to Other Summit Models?\u003c\/h3\u003e\n\u003cp\u003eThe Summit series comes in three lengths: \u003cstrong\u003e12x12 (144 sq ft)\u003c\/strong\u003e, \u003cstrong\u003e12x16 (192 sq ft)\u003c\/strong\u003e, and \u003cstrong\u003e12x20 (240 sq ft)\u003c\/strong\u003e. All three share the same 9.25-foot peak height, heavy-duty frame, and included features. The 12x20 is the best choice for gardeners who need dedicated zones for propagation, overwintering, vegetable production, and storage all under one roof.\u003c\/p\u003e\n\u003ch3\u003eIs the Grandio Summit 12x20 Easy to Assemble?\u003c\/h3\u003e\n\u003cp\u003eYes. The Summit 12x20 is engineered for DIY assembly with pre-cut, numbered components and detailed step-by-step instructions. Most homeowners complete the build over a weekend with standard tools. Multiple assembly manuals are included and available for download.\u003c\/p\u003e\n\u003ch3\u003eWhat Anchor Options Are Available?\u003c\/h3\u003e\n\u003cp\u003eChoose the anchor method that best suits your site: \u003cstrong\u003eWood\u003c\/strong\u003e, \u003cstrong\u003eConcrete\u003c\/strong\u003e, or \u003cstrong\u003eDirt\u003c\/strong\u003e (Dirt anchor includes a Base Kit, adding $1,099). Each option provides a secure, stable foundation tailored to your yard's surface type.\u003c\/p\u003e\n\u003ch3\u003eCan I Upgrade the Grandio Summit 12x20?\u003c\/h3\u003e\n\u003cp\u003eYes. The optional \u003cstrong\u003ePremium Upgrade package\u003c\/strong\u003e adds enhanced features for an even more capable growing environment. You can also add a \u003cstrong\u003eBack Door Transformation Kit\u003c\/strong\u003e to replace the rear wall with a second entrance, ideal for through-access, improved airflow, or separating growing zones.\u003c\/p\u003e\n\u003ch3\u003eBacked by Grandio's Long-Term Warranty\u003c\/h3\u003e\n\u003cp\u003eThe Grandio Summit 12x20 is covered by Grandio Greenhouses' industry-leading warranty, protecting your investment for years to come.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe most space. The most versatility. The most growing power, the Grandio Summit 12x20 Greenhouse Kit is built for gardeners who are ready to go all in.\u003c\/em\u003e\u003c\/p\u003e","brand":"Grandio Greenhouses","offers":[{"title":"Wood \/ No Upgrade","offer_id":51883793318200,"sku":"SUMMIT-1220-W","price":6899.0,"currency_code":"USD","in_stock":true},{"title":"Wood \/ Add Premium Upgrade","offer_id":51883793416504,"sku":"SUMMIT-1220-UPG-W","price":7988.0,"currency_code":"USD","in_stock":true},{"title":"Concrete \/ No Upgrade","offer_id":51883793350968,"sku":"SUMMIT-1220-C","price":6899.0,"currency_code":"USD","in_stock":true},{"title":"Concrete \/ Add Premium Upgrade","offer_id":51883793449272,"sku":"SUMMIT-1220-UPG-C","price":7988.0,"currency_code":"USD","in_stock":true},{"title":"Dirt (Adds Base Kit $1099) \/ No Upgrade","offer_id":51883793383736,"sku":"SUMMIT-1220-D","price":7998.0,"currency_code":"USD","in_stock":true},{"title":"Dirt (Adds Base Kit $1099) \/ Add Premium Upgrade","offer_id":51883793482040,"sku":"SUMMIT-1220-UPG-D","price":9087.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0989\/3770\/0664\/files\/Untitled-design-11_5f40b17e-85c1-4d86-99be-e8144a3b57e9.jpg?v=1775764539"},{"product_id":"grandio-ascent-8x20","title":"Grandio Ascent 8x20 Greenhouse Kit","description":"\u003ch2\u003eGrandio Ascent 8x20 Greenhouse Kit – 160 Sq Ft of Premium Growing Space\u003c\/h2\u003e\n\u003ch3\u003eWhat Is the Grandio Ascent 8x20?\u003c\/h3\u003e\n\u003cp\u003eThe Grandio Ascent 8x20 is the largest model in the Ascent series, offering 160 square feet of growing space in a nearly 8-foot-tall structure. It’s built for serious hobby growers who want the maximum capacity a backyard greenhouse can offer without stepping into commercial greenhouse territory. Like all Ascent models, it features a heavy-duty powder-coated aluminum frame, 6mm twin-wall polycarbonate panels, smooth-gliding double sliding doors, adjustable roof vents, built-in rain gutters, and an included snow load kit, all backed by Grandio’s industry-leading warranty.\u003c\/p\u003e\n\u003ch3\u003eWho Is the Grandio Ascent 8x20 Best For?\u003c\/h3\u003e\n\u003cp\u003eThe Ascent 8x20 is ideal for dedicated hobby growers who need the most growing space available in a residential greenhouse. It’s a top choice for gardeners who want to run multiple dedicated growing zones simultaneously, seedlings, mature vegetables, overwintering tropicals, and cut flowers all at once. It’s also well-suited for small-scale market gardeners, homesteaders, and anyone in a cold or snowy climate who needs a large, structurally robust greenhouse that performs year-round.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNearly 8-ft tall roof peak\u003c\/strong\u003e – Full, comfortable headroom across the entire 160 sq ft interior\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-duty powder-coated aluminum frame\u003c\/strong\u003e – Rust-proof, corrosion-resistant, and engineered for high winds and heavy snow loads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6mm twin-wall polycarbonate panels\u003c\/strong\u003e – Superior insulation and UV diffusion for consistent, healthy plant growth in all seasons\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble sliding doors\u003c\/strong\u003e – Smooth-gliding entry with easy access for people, wheelbarrows, and large containers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoof vents with multi-level handle\u003c\/strong\u003e – Adjustable ventilation for precise temperature and humidity control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in rain gutters\u003c\/strong\u003e – Channels water away from the foundation to protect your installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSnow load kit included\u003c\/strong\u003e – Engineered for heavy snow climates straight out of the box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional back door transformation kit\u003c\/strong\u003e – Replace the rear wall with a second entrance for a true walkthrough greenhouse layout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnchor options\u003c\/strong\u003e – Choose Wood, Concrete, or Dirt to match your installation surface\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Premium Upgrade\u003c\/strong\u003e – Enhanced features for the most dedicated growers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow Does the Ascent 8x20 Compare to the Ascent 8x16?\u003c\/h3\u003e\n\u003cp\u003eThe Ascent 8x20 offers 25% more growing space than the 8x16 (160 sq ft vs. 128 sq ft), making it the definitive choice for growers who want the absolute most from a hobby greenhouse. Both models share the same frame, panel construction, and included features. The 8x20 is one of the largest, most capable model Grandio makes in the Ascent line, and the best option for anyone who knows they’ll use every square foot.\u003c\/p\u003e\n\u003ch3\u003eIs the Grandio Ascent 8x20 Easy to Assemble?\u003c\/h3\u003e\n\u003cp\u003eYes. The Ascent 8x20 is designed for DIY assembly with a clear instruction manual and all necessary hardware included. Components are pre-cut and labeled for straightforward installation. Due to its size, a second pair of hands is strongly recommended, and most customers plan for a full weekend or two days to complete assembly.\u003c\/p\u003e\n\u003ch3\u003eWhat Anchor Option Should I Choose?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWood\u003c\/strong\u003e – Best for mounting to an existing wood deck or raised platform\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcrete\u003c\/strong\u003e – Ideal for permanent installation on a concrete pad or patio\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirt\u003c\/strong\u003e – Ground anchor option for direct soil installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSize: 8 ft x 20 ft (160 sq ft)\u003c\/li\u003e\n\u003cli\u003eRoof Peak Height: Nearly 8 ft\u003c\/li\u003e\n\u003cli\u003eFrame: Powder-coated aluminum\u003c\/li\u003e\n\u003cli\u003ePanels: 6mm twin-wall polycarbonate\u003c\/li\u003e\n\u003cli\u003eDoors: Double sliding doors\u003c\/li\u003e\n\u003cli\u003eVentilation: Roof vents with multi-level handle\u003c\/li\u003e\n\u003cli\u003eExtras: Rain gutters \u0026amp; snow load kit included\u003c\/li\u003e\n\u003cli\u003eWarranty: Backed by Grandio’s industry-leading warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e160 square feet. Nearly 8 feet tall. Every feature included. The Grandio Ascent 8x20 is the hobby greenhouse for growers who want it all.\u003c\/p\u003e","brand":"Grandio Greenhouses","offers":[{"title":"Wood \/ No Upgrade","offer_id":51883795480888,"sku":"ASCENT-820-W","price":4399.0,"currency_code":"USD","in_stock":true},{"title":"Wood \/ Add Premium Upgrade","offer_id":51883795579192,"sku":"ASCENT-820-UPG-W","price":4998.0,"currency_code":"USD","in_stock":true},{"title":"Concrete \/ No Upgrade","offer_id":51883795513656,"sku":"ASCENT-820-C","price":4399.0,"currency_code":"USD","in_stock":true},{"title":"Concrete \/ Add Premium Upgrade","offer_id":51883795611960,"sku":"ASCENT-820-UPG-C","price":4998.0,"currency_code":"USD","in_stock":true},{"title":"Dirt \/ No Upgrade","offer_id":51883795546424,"sku":"ASCENT-820-D","price":4399.0,"currency_code":"USD","in_stock":true},{"title":"Dirt \/ Add Premium Upgrade","offer_id":51883795644728,"sku":"ASCENT-820-UPG-D","price":4998.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0989\/3770\/0664\/files\/Ascent_8x16_Eagle_3.webp?v=1775764738"}],"url":"https:\/\/grandiogreenhouses.com\/collections\/walk-in-greenhouse.oembed","provider":"Grandio Greenhouse","version":"1.0","type":"link"}